There's no better way to put it. Nesoid is like carrying a NES in your pocket. For those who are unaware, Nesoid is an "emulator", or software that acts like hardware. So think of it as a physical Nintendo Entertainment System. Where the NES took cartridges, Nesoid plays "ROMs", or files that are exactly what's on the cartridges. Think of ROMs as your cartridges. ROMs found online, or through Nesoid itself (provides a link to a website where you can download all the ROMs your heart desires). Store them on your SD card somewhere, start them up in Nesoid, and bam! You're back in the 80s playing all those great games, anywhere you go. However fantastical the fact that you can play old school Mario on your phone may be, it doesn't come without it's downsides. Nesoid can hiccup quite a bit on older hardware. I find a quick task kill before playing on one of the lower-end phones to be pretty much required, and even then it's not as smooth as one would like it to be. Again, this problem is only for those with first-gen Androids. However, another problem comes into play when dealing with higher-end hardware. Most Android superphones lack a physical keyboard, meaning you'd have to play with touch controls. That's not to say the touch controls aren't usable, but it's pretty difficult to see what's happening on screen when your thumbs are in the way. This is even moreso a problem for those with first-gen, QWERTY-less Androids. Phones like the myTouch 3G and Behold II lack multi-touch, which is essential to any touch-control scheme. But again, these are limitations of hardware and not the software. On the note of control schemes, Nesoid allows you to customize key mappings, the on-screen keyboard, tap-to-shoot light gun, tilt sensor as D-pad, and many more tweaks that can come in handy. Pros -It's a NES in your POCKET! -Link to download ROMs within the app -Did I say it's a NES in your pocket? -Tilt/trackball as D-pad -Touch-to-shoot light gun So-so -Runs great... if your phone can handle it -Touch controls are O.K. at best, unless you have the screen real estate of an EVO Needs Work -Perhaps an option to play in lower-quality to keep the games playable on older phones? Bottom Line Nesoid is one of the only gaming apps I feel I'll ever need. It's a NES in your pocket. What's not to love?