I have one and it works great. I havent had any problems with it, and Ive had 3 duo systems with bad caps...
Its super small which is cool also, and its got AV output which the US turbo does not have. Also uses the same ac and av cables as a model 1 genesis so you can have them sitting side by side and switch the cables whenever you want to use the other.
With a flash card you can play US and Japanese games, no mods required.