I think this is a very good product if you are recovering from an ankle sprain. The gel patches can be put in the fridge and then on the brace to help in the R.I.C.E. recovery process, as well as provide support when going back to sports' activities.
They are relatively comfortable and not bulky (I can wear them with my normal tennis shoes).
I do not know if they provide enough support to effectively prevent ankle sprains.
The fact that there is a Right-side brace and a Left-side brace of Neo-G Ankle Brace is a very good indication that this is a good product. If you're ankles are asymmetrical, it only makes sense that they are different.