I have exagear desktop on my RPi3b and honestly it's not worth the money currently.
The biggest issue I have with it is the fact that games need to be run in a small window to even make most playable and even then results aren't great. I used it to play Deus Ex, and while i wouldnt consider it unplayable, its certain not great.
There may be better success with other games as I didnt test much aside from Deus Ex (Tried Stardew Valley but didnt have enough RAM on the Pi3)
I believe Floob did a video on Exagear, and tried out some games if you want to see an example.