I hate M105. It flashes too quick and you have to keep spritzing it with water to keep it from drying out during the 2' x 2' section you're doing. Because of this, the splatter gets all over everything if you don't have it covered. It dry's hard too which requires IPA or something else and real elbow grease to get it off so you can see the results.
It was a real PITA to have to scrub and clean all of my plastic bed rails, rear glass surround, rear bumper and windshield wiper cowl area to get al that crap off.
I never ever wanted that job again.
When Merlin showed me the M101 it was all a dream. It cut just as good as the M105 with zero mess.