I'm not trans, so I can't give a full picture about this product, but I'm using it as a compression bra for back support and it works well. I ordered about a size bigger than what was recommended, and it fits a bit loose, but still gives my chest a surprisingly flat appearance. I would definitely recommend compared to other binders I've tried.

A year ago, my friend bought me this binder to help with my chest dysphoria, and it worked well enough that I bought another one. I'm sure there are more fantastic ones out there, but this does the job just fine and for a reasonable price. The only thing"”and I'm fairly certain this has been in a few other reviews"”is that it has a pretty distinct line from where the actual compression part ends and the fabric that goes over your shoulders starts. I've noticed that it gets more prominent the longer you use it, but it's not terrible, especially since it's been so great with flattening me.

For context, though, I have a fairly small chest compared to most, and a small fits me pretty perfectly. I unfortunately can't speak for the larger-cheated people.

The person I bought this for loves it. It binds their chest not only better than the tightest they ever wore a wrap or ace bandage (which is effective but so uncomfortable and unhealthy), AND manages to be very comfortable. They can wear it without noticing, and just feel comfortable - without constant feeling of gender disphoria.
The straps also are much flatter and more discrete than alternatives, so that a very thin shirt can be worn without much worry.
The only drawback is the bottom of the binder is visible in front and back through a shirt, reminiscent of a bra. This can be softened by undershirts, thicker shirts, or perhaps a loose wrap or strip of tape around the binder's bottom.

I've owned a few binders in the past and this one is just crazy tight"¦ I couldn't get myself to wear it after the first time using it because of the pain and difficulty putting it on. I suggest sizing up if you want to buy this because while I had a bad experience, it definitely serves its purpose.

I think it's important to give a bit of context for my review -- so bear with me before I get to the actual product review, as my experience heavily impacts my satisfaction with this binder.
I am five foot two inches, but I have had disproportionately large breasts my whole life. I'm talking 36DDD AND low density breasts, meaning that they sag down to the bottom of my ribcage. "Just don't wear a bra" is something I've never heard and can never do. Growing up, my mother forced me to wear underwire bras, which are so uncomfortable and did nothing to hide how big my breasts were (and still are). It made (and still makes) shopping for clothes a pain, and I can't wear anything even slightly lowcut or form fitting due to the stares and unwanted comments from men.
I've always wanted to be flat chested -- the maximum amount of boob that I ever want is an A cup. I saw a review here from someone wondering why a person who isn't trans would want a binder -- so for anyone wondering... for me, having breasts comes with a lot of pain, shame, and downright inconvenience. I don't want the pain of having breasts anymore, but unfortunately breast reduction (and likewise top surgery) is expensive and has a long wait list. So in the meantime, I've turned to binders to have the euphoria of having no breasts/being flat chested.
My one experience with a G2B binder (a competitor) is that it was WAY too small (I'm talking "wouldn't fit over my shoulders" small) and it had absolutely no give in the fabric. The fabric also felt like swimsuit material and didn't feel very breathable like cotton. I ended up giving the binder to a friend with breasts half my size (if not smaller), and it ended up being tight on HER.
This XUJI binder feels more like cotton or spandex. The fabric has some give, but not as much as a T-shirt -- think tight leggings. It binds from the side and, like a bra, you can make it slightly tighter or more loose depending on your size. For me, the fabric/comfortability and ability to adjust the size make this binder a winner, even if it can't make me completely flat chested. Due to the size and low density of my breasts specifically, I don't think any binder could make me completely flat, so I'm happy with how this XUJI binder makes me look and feel.
My only concern with this binder is I'm not sure how safe it is, especially for trans folks who want a completely flat look and feel. I would get a G2B binder if possible because those are proven to be safe.
One last important note: get your bra size, NOT your shirt size. For shirts, I wear a medium, but a 36DDD ain't a medium lol. I got a 3XL and it's still a little tight on me.