I got my NEX today. It arrived this afternoon. The thing was bought as a gift, and today is my birthday. Perfect timing.
So far, I've only had a chance to try out the original SMB. It plays perfectly. Video reproduction is perfect and faithful, right down to the sprite flicker. Colors are 100% accurate as far as I can see. Anyone who says otherwise needs to adjust the tint and color levels on their TV. Audio reproduction is almost as good. Music is dead-on. The sound effects are 98.9% true to the original sound. There are a FEW that somehow sound more tinny. But you have to REALLY want to hear the difference to hear it. For all intents and purposes, I'd say the audio overall is excellent.
Physically, the unit feels solid and well built. The first thing that hits you is how small it is. I've read bad things about the pack-in controllers. As a matter of fact, I like them better than the real NES controllers. I was expecting the worst, really. The NEX controllers are smaller and fit your hand better. The button position for SELECT and START is a little goofy, but so what? How often do you use those buttons? And are they really all that hard to find when you need them? I've got to get me some of those wireless controllers. This system has wireless support built-in! The AC "brick" adapter is the size of an ice cube. Why can't all systems have power adapters this size? The system comes with a very high-quality instruction booklet in the size and shape of a NES cartridge. High production value with 45 glossy pages and all. Color illustrations! Better than we got in our US Turbo game manuals. It also comes with a composite audio/video cable and an NES "game rarity" guide. Overall, the feel I get is very good about the production value of the package as a whole.
The system cost $60. I would have been more than happy spending that much on this unit. You get the ability to play both Famicom and NES titles as well as built-in wireless support and composite video-out and lose the hassle of having to play games (no pun intended) with the console.
IMO, any nay-sayers of the NEX are annoying Nintendo fanboys that badmouth anything not branded "Nintendo." Well, the truth is this is a great modern-day solution for your NES gaming needs. Short of find a "real" Nintendo top-loader, this is the next best thing. And in many ways, this IS the best thing. Can you play Famicom games on the top-loading NES without a converter? How about use wireless controllers without a receiver? Composite video-out? So I'll lose the ability to play "Castlevania III". Since I don't own the game, it's no big deal. If I ever DO own it, well, my toaster NES is still plugged in waiting for some of that love. In the meantime I'll be playing my NEX.