Perfect watch for my son. It was easy to set up. He started playing around with all the apps immediately.
I thought that it might look cheap because of the price, but it doesn't. Very durable.

I love that this tech is so affordable!! So refreshing! It's very easy to remove the back with no tools. There is a notch in the plastic molded back piece.
Easy to install the SD card as this part is pretty intuitive.
It took me some time to figure out where to put the SIM card as it wasn't obvious how the silver cover of the space moves. I wasn't sure if it slid up or flipped up and it wasn't an easy flip up. So I used a jewelers flat-bladed screwdriver driver and hoped for the best flipping it up. it worked and it was a simple install after that. It took about 30 minutes after registering the SIM card for it to recognized the network. Kiddo called me from daycare! A word of warning, it's very exciting to the kiddos. Make sure you set up guidelines for when to call.
As recommended I used speedtalk- but had to order the prepaid sim card from their website directly as Amazon was out of stock at the time. I figure 5$ is extremely affordable for just being able to call mom or dad.
Setting the time is a little tricky and you need patience and a firm finger on the screen.
I'm not sure kiddo has explored all the games yet and I haven't measured battery time yet.
So far, I'm extremely please to just have the calling capability if nothing else.
It's affordable and a great way for a kiddo to keep in touch.
It's not waterproof - but with the ease of access to the back that makes sense.
It's wonderful. By the way- the instructions don't tell you exactly how or where to place the SIM card- which is why I outlined it here.
I hope this review helps!

Works as expected for me. It was easy to open the back with just my fingernails to insert the included 1GB micro SD card and my SIM card and everything worked right from there. I've tested it with some phone calls and voice was loud an clear. Touch scree is decent for the price and quite nice. Of course no multi touch function here - just basic touch or swipe, but I've bee able to use all the functions including playing some basic games. I also found the 3 different alarms very useful with very suitable settings. Took a couple of hours to charge, but charge lasts now about 1 week, which is awesome. Watch is very light and comfortable to wear for children. For adult watch strap would be pretty short, but could still fit for smaller adults. Camera works, but of course has limited resolution, but colors are quite ok. Also the music player works good and what I really like is, that the player can be run in the background and I can still use the watch while hearing music from it. Speaker volume on max level is quite loud and screen is very bright and even works outside when the sun is out.

My 11years old daughter loves it.

If you are looking for "phone" function ,it DOES NOT have it.
There is no slot for SIM card inside of watch.

My twins love this watch. Of all the things I buy them, this watch and their IPads are what they use the most.