I stripped a Quando flip flop hub the second day I had it. The cog was put on at the bike shop that sold it to me, and instead of returning the wheel, I went to the store and told them "you guys knew what I wanted out of a wheel, and you gave me a piece of crap that couldn't even work for a 115 lb girl." I then told them that I was taking my business elsewhere.....which I did. And to add insult to injury, a week later the crankset they sold me when I initially placed the order for the wheels, stripped off of the spindle.

Moral of the story: Quando sucks and avoid Wolff Cycle in West Philadelphia at all cost.