Retro Duo Portable

Hi there CAGs I recently saw this item at a local video game store and I'm kinda interested in this, I figure it would be kinda handy to use when I'm retro shopping so I can test NES/SNES carts (like at the ponyville swamp meet or the Timmy/Tommy GamingShop). Does anyone own one of these or have used them? feedback please

If you really want to play SNES games on a tiny screen, go for it. Personally I can get a full-sized system and some games for the price (without hunting) where I live, but this device looks interesting.