This is on a Weekend Deal on Steam right now for 50% off ($19.99).
I remember being really excited about this when it was announced, but it fell off my radar when it was released. I heard it was really buggy and got some really unfavorable reviews, but I'm glad I bought it. They nailed the space marine feel for FPS, everything feels super powerful and movement is really heavy.
Given the fact that they'be been patching this consistently, I'd say it's a good time to buy in.
I have a 3930k / 980Ti and I pull mostly 40-50fps at max settings / 3440x1440. I do drop into sub 30fps but that's when there is an insane amount of combat happening. Given the visual fidelity of this game, it doesn't bother me.