I am not an expert on ukuleles, however I love the sound .It comes with a protective but very soft zippered case which is kind of nice when putting the uke away keeping It dust free.
The uke looks to be very well constructed and It has a nice sound when tuned.
When I am done practicing the chords and fingering I go over to my concert Enya and my fingering and practice sessions on the mini have paid off. I have improved I am not as sloppy and more precise which makes me very happy.
I have medium sized hands and the mini does take a bit of getting used to. Other mini pocket ukes are much more expensive . I guess it's a matter of taste and budget. Hope this helps. I don't think you can go wrong with this little uke however you use it.
So for me , the Ultnice Mini Pocket Uke is a five star rating.

This uke was a really pleasant surprise. I am a luthier and musician and as such am pretty discerning. This little uke has great build quality for this price point. All hardwood body and neck, decently finished frets, smooth tuners, and good action right out of the box. They could soften the corners of the nut more but it really doesn't affect playability. They are using Aquila nylegut strings which are fine quality. As some have noted, it does sound better tuned to A D F# B. Now that it has been played in for a couple of weeks it's sounding really good. My wife wanted it as a travel uke for entertainment on the road and to stay in practice and she is really enjoying it.

Guys. It's really that small. It reminds me of a 1/4 Violin compared to my Tenor :D

Construction:
The dimensions are "half the size of a soprano" i.e. it's not a soprano ;) As an amateur luthier, I was pretty impressed with the construction. Inside the body, there's actual edging to connect the faces to the sides and a single brace right beneath the soundhole (feeling with my pinky, the brace isn't technically shaped "correctly" as it's just a horizonal piece of wood). This is a huge step up from "first act" guitars :P

The instrument has 12 frets with great intonation for something this size. I minor qualm is that the bridge isn't placed in the best location on the sound board for resonance but, again, they were going for tiny and it probably wouldn't make a difference at this size!

Fretboard is flush with the neck, frets are well-dressed, and tuning pegs keep the strings where they need to be. I was very pleased to see an Aquila string tag hanging from the neck when I opened the box :)

The tuners are unusually heavy which makes the instrument unbalanced. It's feels about as heavy as a can of coke with most of the weight on the headstock.

The nut/saddle feel like synthetic bone. They get the job done.

Appearance: It's a tiny ukulele guys, what more can you ask for?
First and foremost, it's a conversation starter so it has to be "flashy." The entire instrument (sans fretboard) has a thick semi-gloss that would be durable for lots of hands picking it up to mess with. The drawback to this is a potential loss of tone but.... it's so tiny, the tone is what it is. There are a few nicks here and there that come with the territory of a $40 instruement. There isn't a label on the headstock and there's no model info in the soundboard (bummer, it's something I'd want to refer people to).

The icing on the cake is that they even took the time to drop in fret marker inlays in the right places. My monstrous hands take up the entire fretboard so I don't see them when I play but the little detail makes the instrument look "right"

Tone and tuning: Intonation is great. Tone-- it depends on your tuning. Standard tuning (gCEA) is playable but sounds a bit warbled-- the tension is too low. I stepped it up a fifth (dGBE) and it sings :) The tension at this tuning will let you do slides and bends like normal.

Dynamics: There are two volumes-- on and off. You can technically get loud with it by strumming harder but don't expect to be heard at your next jazz band recital.

Very happy with the purchase (considering the only other sapranino on the virtual market is $300). Package arrived in 5 days when it was an expected 14 days.

Summary: It's not a soprano. If you're trying to get into the uke world, I'd recommend a larger instrument where you can spread your fingers out. If you've already had the uke kool-aid and you're looking for the next [small] thing, here it is!

You have to feel comfortable with the small size. I did not keep this ukulele because the finish wasn't good. I did buy the same model from another vender and it is finished well. I like the model and enjoy carrying it. Cases are hard to find. Someone gave me a tip to treat the corrugated box with White Glue (Google- How to make cardboard hard like wood). Fun arts and craft project.

Been using for about a month now. Tested as is and with mods. Got the strings to hold tune for longer after a few solid days of noodling on the strings. Even after swapping strings the tuning pegs seem a little squirrely sometimes though, they feel just shy of slipping so I'm compelled to leave a tuner on/nearby most of the time. Sounds like nut could use some work too, but I didn't bother since the difference in intonation was minor enough (think charmingly out of tune like a toy piano).
Definitely needed at least a string swap to sound less like a cheap toy or for the C to not sound too slack. Fluorocarbon made it a little quieter, sound richer and easier to fret, though the Nylgut Aquilas are worth keeping for a standard size uke.
The soundboard was made of a very soft wood, very easy to dent, so despite needing all the help it could get in the sound dept, I varnished the top of mine for protection. I also padded the provided unlined fabric case with thick craft foam I had to have a semi hard case for travel.
In all, a fun craft/maybe minor luthier project, but unless that's your jam, or you were after the specific size, the money spent could go towards a nicer uke that plays nice as is.
I was extremely pleased this fit with lots of wiggle room in my carry on suitcase and backpack, so I wouldn't have to check a bag or count it as a separate piece of luggage for travel (hawaiian air) and without concern for damage from snug fit as I would have worried about with my soprano. My mods did make it a little quieter but paid of very nicely, it played like a champ for a living room full of people and I don't expect this little one to play for bigger crowds without assistance.
As others mentioned, this uke requires precision and good technique to play as the fretboard is more narrow and strings are closer together, but the skill transfers to standard size ukes which can improve or maintain good fret hand habits.

Shaffstall scale*:
oob $35/$60.38
modded $95/$83.12

*What is the Shaffstall Scale?
Made by a friend of mine, C Shaffstall. The perceived monetary value gotten (or what you think you'd pay for it) vs the actual cost. This allows for a contextualized sense of the value
Ex: $5/$6 (felt about the right cost)
$5/$20 (felt way expensive for it's cost/cost felt inflated for quality recieved)
$5/free (I'd pay this much for it despite actual cost/ pleased, quality is much greater value than cost)
vs -$5/$1 (you'd have to pay me this much to use / own it.)