I saw this for sale years ago, but for the fact that I still owned the original Atari 2600 and about 180 cartridges, if I wanted to play it I could just fire up the original system. However my Atari 2600 has recently shown that the 30+ year old components may have aged to the point that there is a run of tolerances so I might find myself replacing old dried up capacitors etc. There seems to be something out of tolerance on the channel 2/3 transmitter side of the system to where picture quality is not as sharp as it use to be.
But I did however buy into these Single Joystick with 2 RCA cable ( Audio/Video ) Game Systems that Walmart had for Coleco, Intellivision, Atari, Sega Master System, and 2 which were by Bally Midway which had the better games for Atari etc. They each take like 4 x AA batteries and I havent played them in a while. I now realize that hopefully none of them were stored with batteries in them to leak. Going to check that out when I get home from work.
I also have a small battery operated Sega Genesis that is just like this Atari Flashback in which it wont take cartridges its all just what ever is on the internal ROM. The Sega Genesis plays well but also requires 4 x AA batteries and it has a sticker suggesting alkaline batteries only, but I have gamed quickly on it with a cheap $1.00 - 4 pack of Rayovac drycells and it played just fine. I cant justify buying a pack of batteries these days for $6.00 so I usually go cheap for the $1.00 packs at Walmart and Dollar store.
If you have kids in the house that turn stuff on and forget to turn it off, you actually save money by not burning $6.00 per power switch mistake and only $1.00 per "I forgot to turn my game or toy off" for a $5.00 savings per occurance. I also tried the route of rechargeable batteries, but my wife pulled a no brainer and threw the batteries away and didnt look to see that they were rechargeable, so $15 wasted there in trying to save money on batteries. Batteries dont need to be this expensive, its insane! .... sorry if I went off topic quickly there on battery prices.
But anyways my brother bought the Atari Flashback and his complaint was that it should have all titles ever created for the Atari 2600, and it only has the titles that they were given the rights to add to the systems ROM, so if you want to play some games you either find yourself buying the original game on ebay etc to plug into your Atari2600 which requires a RCA to Coax converter for modern TV's or as my one Canadian friend stated, there are emumators out there on the web to play the games on your PC, although not sure about the legalities of them, so I haven't messed with those since after all I have the original Atari 2600 to play them on.