I think the biggest problem I had with it was the new controls. I
still haven't gotten used to them. You can use old Gamecube controllers
which makes it so much more like the originals. I really like how well
they stuck to the original gameplay, while still vastly improving
things.
My N64 still technically works, even after the dog
used it as a toilet. Those older systems may have been simpler, but
they are sure resilient.