T&R is WAY better than Jr, but the touch screen controls can drive any sane man to an asylum. There is the D-pad, too...
Graphics: The levels are in full 3D, but your monkey is in 2D, making it kind of hard to get used to.
Sound: Wait....that was music? I thought that was a child screaming bloody murder in the background. Oh well. The SFX, however, is the kind that SMB veterans will recognize, but the monkey voices are higher-pitched than in the GCN version(s).
Overall, the game is pretty much the best DS puzzle game around. If you own a DS, or are just a fan of SMB or puzzles, this definitely won't disappoint.