I really loved the concept, and one of our old regulars here highly recommended it at the time (maybe like 2 years ago?), but the Steam reviews that have been coming in since have been pretty negative/mixed; I see the same issues over and over - lots of complaints about performance, and apparently PvP is just awful, with larger/dominant tribes ruling everything and killing everyone else, which doesn't sound like fun.
I've seen these complaints for months now - I check up on it every time it goes on sale but it doesn't seem like the devs are doing much about these problems. I'll still keep an eye on it because like I said, the concept of taming dinos in a survival game is really cool and all, but until they start improving the game and fixing what's broken instead of just adding in new stuff, I probably won't be buying it.