Mass Effect 2 and 3 came to XBox One Backwards Compatibility a month ago and I just recently finished them again. However, I must express my disappointment in one area.
It seems that the transition didn't work well because both games have glitches in them. One glitch in Mass Effect 2 got me stuck just as I was about to finish the mission. (My own obsession of being an overachiever at this game, having me search every nook and cranny for everything, is partly at fault here.) This in turn forced me to go back to the last save point, which made me face the "boss" of that mission.
However, Mass Effect 3 is off the charts in glitches. We have characters not loading, (Sure they're there, but you don't see them.) Shepard looking the wrong way and freeze points. However, one I must at all costs welcome is one glitch I ran into by pure accident.
Bottom line, I hate Brutes! I hate them with a passion! It takes a lot of bullets to kill them and melee attacks are useless. (In fact, it hurts you to do a melee attack on them.) So when I can exploit the game with a glitch, it makes them more tolerable. Basically speaking, I was able to despawn one on the Tuchunka mission where you have to dispense the cure for the genophage. It actually registered as me killing it. I praised that glitch when it happened.
Too bad I can't say the same for Banshees. They are evil incarnate in my eyes. There are no known glitches to get rid of them. Good luck when you face two of them near the end.
So yeah, enjoy those glitches until they can fix this. I guess this can be an excuse to not bring a game to XBox One Backwards Compatibility.