Maighstir: It might be due to my grip (damned the controller feels a lot smaller than it did when I was a kid, which is understandable since my hands are a lot larger) but I find in Gameboy and (S)NES emulators (my intended, and only, use of it yet) that it frequently registers "up" rather than "right" (and "left" to a lesser extent) and I need to be a bit more precise than I think I
should need to in order to move horizontally in games where (when) vertical movement is valid.
Navagon: That is a good point. I've got no idea how the controller will feel in my hands after all these years. I wasn't that young when I had a SNES. But even so, I am definitely used to controllers more ergonomically designed than that now.
It might also be due to the controller itself, I don't have a real SNES controller (never did actually, I only had a NES myself, played the SNES at friends' places, and that was some 20 years ago or so), so I cannot really compare them.