If you enjoy puzzle games, Dr. Mario, any system, any version, has to be a good thing! I believe that in terms of pure unadulterated addictiveness, there is no substitute.
I have loved and played this game since the NES days. Dr. Mario has been played religiously for over 10 years in my home. When I saw the N64 release coming, I could not wait! Once received, the 64 version was nice, but nothing added over SNES other than the hard to see 3 or 4 player modes. Sure, you can choose some other tunes, or a new background or two, but who cares?
If you want straight Dr. Mario, but don't want to dust off the SNES or NES, than this cart is for you!