I am about 10 hours and half main story missions in and haven't got bored for a single second. The expected 25 - 30 hours are the sweet spot for me. Even the side quests are fine as they are beneficial to the walkthrough. I simply love exploring the beautiful world in 4k ultra and over 80fps, the mechanics are great, not many bugs. I must admit I like the ubisoft formula. Played most their AC games, all FC and some others.