Works really flawless. I have ArkOS installed on my SD card and all games I was looking for to play works like a charm. I love and play PSX, NES, SNES, GB (yes, that is really fun to play Street Fighter 2 again on small monochrome display) and GBA games, didn't try PSP or GameCube games.
Device looks really good too. I was little bit afraid of plastics, but everything is firm and well done. And even missing wifi is nothing to be worried about. You can add all games and stuff via card reader in any laptop.
I recommend this device to everyone who wants to play classic games on the go.

So far I have ran GBA, Game Boy, Game Boy Color and SNES games using ArkOS and the experience has been fantastic. However, when the unit arrived the included sd card was defective and was unreadable by both the RG351P and multiple computers I tried plugging it into, and any attempt to format it resulted in various errors. Judging from various videos and reviews this does appear to be quite uncommon and unlucky. After that minor annoyance I have nothing but good things to say about this device. GBA emulation is absolutely awesome and I absolutely recommend this to anyone looking for a good GBA emulation experience.

The build feels very high quality for beeing plastic. I have used it mainly for pokemon gba rom hacks.
It arrived after a little over 1 week.
The battery life is alright and the transfer og games goes fast and easy over wifi.
The software is a bit spotty at times, but it rarely crashes.
Turning it on and off is slightly tricky at first. If you tap the off button it only turns off the screen, if you want it completely off you have to hold it for a few second and let go and even then it sometimes only turns off the screen.
Over all i am very satisfied and for the price it is the absolute best product on the market

I got this during the summer sale, and I couldn't be happier! Arrived quicker than I expected (about 2 weeks), and came ready to go with all the emulators and enough games to keep me busy. That being said, I've since updated the operating system to ArkOS, and added the games I wanted on my own SD card, and it's exactly what I wanted. Emulates everything up to PSX, and most of DS (unless it's the touch screen stuff, can't do that), and you can get mostly playable versions of N64 and Dreamcast (depends on the game - playable but not perfect). You can get a lot of playability with PSP as well (just not the super active titles like God of War, again, playable, not perfect). Check out Retro Game Corps online and YouTube to get the most out of it, but otherwise, I strongly recommend this if what you're looking for is PSX and prior. Haven't tried the Retroid Pocket stuff to see how it compares, but I'm satisfied for what I paid (less than $100 CAD at the sale price).

It plays my favourite retro games on the go, great for my way to work and back.
Quality of material feels great aswell.
Very happy about the screen protector, and other extras, that came with it.