Being a huge Pac-Man-o-holic I did download this NES version that was released on NA 3DS VC this past week. Not only do I own this very game for the NES already, I also downloaded the gameboy Pac-Man VC game and I also own the Pac-Man/Galaga Dimensions 3DS cartridge game and love it.
How does this version stack up to the rest? Well, it's in color, for starters, the controls are a little wonky as far as I'm concerned. Using the circle pad, sometimes Pac-Man doesn't turn the right way (is this just me or...?) Also, the screen is quite small. The thing I love about Pac-Man/Galaga Dimensions for 3DS is that the screens were huge, in 3-D, and took up the whole screen pretty much. These VC games just use the top screen and are quite small. On this version, you can really tell. The sound is okay, some of the blips and bleeps are very 8-bit and nothing like the original game sounds. If you want a version of Pac-Man in color, and you don't mind it being a Nintendo NES version of Pac-Man, then you might like this. I actually found that I preferred (of the two VC versions) the gameboy version a tiny bit more because the controls didn't seem as weird, and the screen is larger on the Gameboy Pac-Man VC release.
If you truly want a fully enjoyable Pac-Man experience, go ahead and opt for the Dimensions 3DS cartridge game. It's probably cheaper than the $40 newly released price that i paid for it, but it's worth every cent (if you already love Pac-Man you'll love it.) I would give this version of Pac-Man a 5/10 (the wonky controls and tiny game play screen, for starters), and I would give the black and white gameboy Pac-Man a 6/10. It's a tiny bit cheaper than this version, the game field view is larger and (to me anyway) it seems more immersive and fun than this Taito/NES version.