I have maybe 45 minutes to an hour under my belt. It's early access so there are bugs. If you're new to KSP then hold off for a while. If you've played comfortably the. You just have to decide if performance issues are a deal breaker. I like what I'm seeing so far but it's a long road ahead. they need to reintroduce some features that didn't carry forward, and they need to optimize heavily.