It's really good! Got into the series because it's one of my gf's favorites. Started with Chaos;Head and the experience is kinda light and day. You go from an insufferable protag (and sci-fi horror) to one that's pretty cool. Okabe has his faults but is fine otherwise.

I will say that SG has a really slow build, up until the part where the stakes get really high when you least expect it.

That said, it is pretty long, especially if you're a slow reader like me. My playtime is off by at least 2-4 hours cause there were times when I just idled, but I'm 70ish hours in. It's worth it, though.