Ok, I've spend my first hour with the S5110 and had a good chance to compare it with the S601.
First impression was much more positive than I expected. The package of the S5110 is nearly identical to that of the S601 but it contains a separate wallwart for charging, a USB cable and a cable to convert micro to mini USB. The device itself is about as thick as the S601 and a bit thinner than my PSP1000. The good
The build quality is surprisingly good with no creaks and rattles and no "dead button feel". The 5110 was half charged so I could do some testing out of the box. Start up is fast. Much faster than any of my iOS devices. ICS looks quite nice on the 5 inch screen but doesn't add much more than it's older brother on the 601. The higher resolution really pays off. Off course the screen isn't as good as the PSVita but the latter costs about 5 times as much. Sound is an upgrade to from the 601. Nice stereo speakers and crisp sound. I have to disinfect my house though because the only demo song on the device was the Back Street Boys
Response time is much better than the S601. The screen might be resistive but it really feels like something between capacitive and resistive. Angry Birds is fantastically playable with my fingers. Everything feels much snappier, even compared to the 1Ghz Skeltonized 601.
I played Mario 64 which is about as fast as on the 1 Ghz 601. At the moment I only have the stock apps and emus. Streets of Rage 3 on the Genesis emu was okay, only the sound is a bit weird which is normal (same on the 601)The bad
There is no Play store! I had the Play store right away on the 601 but can't seem to find it here. Wifi didn't work at first because there is a switch that needs to be in the "on" position. At least the 5110 doesn't have that weird hardware "off" switch.The weird
I switched the input from "Baidu" to "English". My wifi password contains numbers but the keyboard that pops up only showed letters! Only when I switched back to "Baidu" input could I use numbers.
I can't wait for Skelton's version to clean up this beast. If you need a donation mate, PM me your PayPal address.