Eh, those keyboards are junk, it's too bad considering how cheap they are. The black switches they use aren't good and have a very annoying reverberating sound (but that's just my opinion, not the real problem with it)
The real problem is the rollover, it has severe issues where you can't even press 2 keys in some situations, and the common ones doesnt get past 3 (so it was falsely advertised and not tested at all) - Even the newer fixed models don't have good rollover if i'm not mistaken, so technically it isn't suited for gaming without the rollover.
I'd say it's worth $20 if it can be had for that cheap (just to try the black fake alps switches), but make sure it's not an older one with the severe issues. I will say that it is of very high quality and it looks good.
