The whole thing is big enough where I can just put it on my lap instead of on a table. If you put it on a table, it won't go anywhere, either.

I have an SE stick too. That's a bit smaller so your hands can't really rest on it as well, but then again, I haven't used it enough to know if it slides around or not. Like spenz said, you probably could just put some different feet on the hori and be fine.