Actually, I wanted this part because I wanted to build me a bike more or less completely defined and everything should be affordable in moderation, so that it / a factory price of + - 500 does not exceed. When I had then, I was indeed impressed by the low quality, but realized that it would be no match for my needs, and I also found then still in my Kruschelkiste adequate else derailleur.
But as it is in life sometimes so I could still use that part specifically for a friend, the much needed inter alia this part of his bike and oh coincidence had just birthday, was installed and mate is satisfied. Therefore certainly also recommended for each of the low, a well-functioning spare parts from Shimano needs.