Turbo Booster plus was such a ripoff. I mean if it gave you digital 5.1 suround it would of been worth it but come on. The turbo CD expansion was worth it mainly because of Ys I and II but booster is a not go. It was a marketing hoax of the 80's. Good idea making it a huge piece of hardware. Tricked most people in thinking it could tap into the pentagon and such.
The Booster Plus was the equivalent of a back up ram cart in the 32+-bit generation. It was still worth it just for composite out. Getting to replace the shell in the back with something you never have to remove just to plug in the ac adaptor was a bonus too.
The PS3 shipping with only composite cables for hundreds of dollars more than the Xbox 360 is a way bigger rip off than the TG-16 requiring a Turbo Booster to use a video connection most TVs didn't even support at the time.
Where I lived the Turbo-CD was $800 and the Turbo Booster was $50. Not only were dollars much more valuable back then, it was more so if you weren't an adult. The Turbo-CD only ran two games for quite a while. Even after Ys I & II finally came out, that was a huge amount of money to run a single game. Plus the Turbo-CD was such a huge piece of hardware that the combo was the largest console since the pre-8-bit generation.
Try telling a kid who doesn't want to continue keeping pages of password logs just to play Dragon's Curse or continue guessing at all the password icons in Neutopia that look identical to others on TV sets of the time in RF that they should steal a few cars to finance a Turbo-CD instead of simply skipping their next game purchase to make many of the games they've already own playable.