I've both played and GMed Blades in the Dark. I'm not a big fan of 5e, but I am experienced in it and most editions going back to AD&D. I've not played Band of Blades yet, but the mechanics are very similar to Blades in the Dark. I've only just started reading the Monster of the Week book, so I've not got a good grasp of it yet. I have experience with a pretty wide variety of systems. (GURPS, old and new WoD, Palladium: RIFTS+TMNT, Twilight 2000, Traveler, Anima, Ars Magica, FATE, Savage Worlds, M&M, etc.)