I just picked up my Retron 5 today, the last in my area at local stores. I am really really pleased with the system so far! I have it hooked up to my 37 inch Toshiba LCD and have a 5.1 surround sound hooked up. I'll just make a bullet point list of what I've done/how the system handles stuff/etc.
-I updated the firmware to 2.1- Not really a pain in the butt, but I was just scared either I'd screw up the process or for some reason my system would brick. Everything went smoothly and it works great!
-My NES&SNES pins are just right on the console, my Genesis and Famicom pins are uncomfortably tight & the top plastic by the cart slots Does feel flimsy
-I've tried every original controller and all work flawlessly. I played Ninja Gaiden 1 on the NES and noticed no lag as well as no lag on any other "system"/game. The Retron 5 controller isn't as bad as reviews I've read have made it, but that said, I'll never use it over originals.
-Has anyone tried controller extension cables, say for their SNES controllers, on the R5? I don't have any and have heard other clone consoles don't take a liking to them. I certainly would buy & use some if they work on the R5
-EVERY game I've tried has worked from all systems. I tried various GBA/GB games, Devil World&Excitebike (Famicom games,) StarFox, Super Metroid, Mario RPG, Super Mario Bros 3, Castlevania 3, Return of the Joker, Hyperstone Heist, Contra Hard Corps, and all have worked without a hitch.
-I ballsed it and copied saves from Link's Awakening, Minnish Cap, Link to the Past, Super Metroid, FF3, and all have copied to the R5 Without damaging the original save on the carts
-I SUPER Ballsed it and copied a save from the Retron 5 to my Link's Awakening and it worked without corrupting the cart!
-I've tried Repros of Gimmick! and Sweet Home and both have worked no problem!
-I tried my Taiwan pirated black Super Mario Bros 3 Famicom cart my Dad imported for me back when SMB3 launched and it dumped the rom but didn't pull up a game name on the menu and stated that the R5 couldn't fully read the rom. It asked me to stop or continue to play, I played it and it worked great
-I jacked with mapping controller buttons, screenshots, moving stuff from the internal to SD card without a hitch
-I tried out the enhanced sound mode and came away thinking it was ok. It kinda muddy the sounds but brings out the bass. My sub gets a major workout when it's on but I'll stick to the regular audio, it can rock the bass just fine. The Genesis audio seems a bit off, not quite as robust as my Genesis 1 but not horrible by any means. If you're a casual audio guy, you'll be fine. Sound on NIntendo systems sounded just fine and the NES sounded Great.
-The picture is flat our gorgeous! Pixel perfect gorgeous! The settings I use are "Force Origianl Resolution" this keeps it to a pixel perfect ratio and doesnt allow stretching, NO filters, they just look hideous all around by blurring and mucking up the image, and I Do use scanlines, I think it does look more natural. The with or without scanlines wil be up to the individual but either way it's a very pretty picture
-I took screenshots, take a look! (super cool feature I think I'm going to love!) Scanlines are NOT added to screencaps
-I'd like an update for sound options for the R5 menu. The sounds it makes are annoying "dinging" sounds and other obnoxious effects. It sounds cheap and extremely loud compared to your game audio, I turn them off but I'd like some sounds.
-I'd really like an updated wireless controller for this with a good dpad, or as I stated, if controller extension cables work for this, it'll be just as good.
-I really don't have any other complaints, but I just picked it up and have spent about 6 hours putting it through it's paces
Overall I'm Extremely pleased with my purchase. The convenience of having it hooked up to my big screen and stereo is awesome. My CRT is a Commodore 1702, although I LOVE it, the bigger screen is great. I'll always have my normal consoles hooked up to my 1702 but for more social gatherings or when I'm feeling like some crisp HD I'll be using my Retron 5. Hope this is informative. Feel free to shoot me questions too!