I use one and the top heavy weight is super awkward. Nice part of the DS was that the weight was in the bottom, the flip-up part was just a dumb screen.
Backbone on iPhone is an amazing experience. What shocked me was how well they nail the software side of the "game console". it has a full home button and button based UX for selecting games
I have a clip for a regular xbox-style controller (SteelSeries duo) and I gotta say the top-heavy weight is extremely awkward, and my phone is pretty small (pixel 4a).