I got mine 2 days ago.
I'm in love with the device. In fact, I'm struggling to find faults with it. At first I ran into a few quirks, but they've all turned out to be permanently fixable. For instance, out of the box, the diagonals on the d pad didn't work. Then I switched the game pad to PS3 mode and the d pad started working FLAWLESSLY. I'll take more on the d pad below.
The build quality is definitely premium. Basically, it feels as high quality as a ninty handheld. In fact, in ways feels better than 3ds xl. It's heavy, the finish and materials feel very very good. Only build quality irk is the hinge is slightly too tight. It creaks but not in an alarming way, and just opening the device slower solves it. It's really a very minor quirk, and a sign that the hinge is not going to break, actually.
The controls are superb. At first, the d pad and buttons feel a tad different than Nintendo, because it's not Nintendo. But the responsiveness is on point with the d pad and buttons. These are buttons for gamers. What the d pad lacks is a strong sense of feedback. The d pad itself does feel extremely comfortable, and is very accurate and again responsive, including the diagonals. But the sense of feedback could be better, but once used to it, don't be surprised to prefer it to ninty d pads...it's that good. I'm giving the d pad a 9/10, because in actual practice, the accuracy and responsive are good even for speed runners and fighting gamers.
The other buttons have no room for complaints. Analog sticks are better than ps vitas. The resistance is more comfortable and has a softer spongier feel, while being more accurate than vitas. The other buttons are great. The trigger buttons are a bit TOO clicks though, but feel admittedly incredibly good.
Sound is great... No complaints
Screen is...jaw dropping....the colors are just gorgeous...and no ghosting. Very responsive and crisp. The screen makes games like yoshis island make my mouth water with its crispness and vivid colors.
Emulation is very solid. Anything up to snes is perfect. Sonic adventure 2 on dream cast runs at a blazing frame rate, as does many other dream cast games. Again, the screen makes games like sonic adventure 2 pop off the screen and melts my eyes.
Battery is excellent. I've gotten more than 9 hours on it playing ps1/dream cast/n64
I can't recommend this thing enough. I paid 140 for it NIB on eBay. I will be honest with you all, this is not an 140 dollar device, in hardware or its capabilities to a more retro gamer. This is more like a 200-300$ device in terms of quality, hardware, screen etc.
Does anyone have any questions for me?