I’ve played through the entire main story, but only a few of the optional side missions (I am planning on playing through them, just haven’t had the time yet). I picked it up because I love their earlier game, Gunpoint.
It took me around 15 hours, and there’s at least probably 5 more hours for me to get all the optional objectives in the main story missions, plus the optional side missions.
I would highly recommend the game - the story and gameplay are both pretty entertaining. The little bits of character conversations you get at the start of each mission are pretty funny and well-written. It’s not very difficult (as there’s no % chance to hit like in x-com, actions are guaranteed when you execute them, and there’s unlimited rewinds within a “turn”) - more puzzle-like than tactical combat, but the added “Confidence” objectives are fun to try to get.