I almost bought a mafia game from them I really wanted. The DRM didn't get me but their lack of a downloader did. Trying to download anything of any size without being able to stop and start from where I left off is impossible.
Actually thats exactly what you do with the exe files you download from them - you can pause and restart at any time.
* * * * *
To the OP, I actually kinda like GG, but it aint flawless:
Some great deals on games for steam etc (if thats your thing)
You tend to know what (if any) DRM is on the games you get before you buy.
Some DRM free games / minimal DRM games downloadable from GG also come with keys for other services (handy for some in certain situations too).
Blue coins you get for reviews, purchases etc can be used to buy more games.
They have games unavailable here.
The site is a bit bloated for load times for me, and the layout aint great.
I get pretty confused looking through my games on there.
The "social" aspects of the profiles feel a little too like some wierd MySpaz plugin or summat.
The community is overseen by our own Licurg III of Sacrificio who will stop at nothing to purge the world of anything but Sacrifice, and will Sacrifice his army to destroy you unless you buy Sacrifice.