I used to use OFGS all the time, but it had too many issues.
If it gets fixed up I'll use it all the time, but for now I'm using default.
It doesn't update often, but the only issues i notice is that the Big Picture button is behind the window name on the main Steam window, and the music library doesn't have any UI yet
Considering i don't use either, it's not that big of a deal to me