I'd say the reliability statement is still a bit early (GRC has been out four years, GR Yaris with same engine has been out about 5-6). But so far it does seem fairly reliable at least up until someone decides to push the power limits for various components.

It's insanely fun. I previously had a BRZ which was also a lot of fun. This is a whole new beast. Especially in not ideal conditions (wet road in the fog on a mountain and presumably in snow or dirt).