Bumper with workmanship

The bumper does exactly what it should. It protects my HTC ONE M7 against drop damage un scratches.
(No contact of the back to the table when you lay the One)
However, it does so without much aesthetic !!!
The bumper has to be look great potential well, but due to faulty workmanship, he creates this is not.

The holes for the connections are not symmetrical and in many places depend rubber residues.

Who therefore has no problem can strike a good conscience.

Personally, I have criticized the processing at Yayago.
I was offered that I get including return shipping refunded for the Bumper my money.
This makes me come to the conclusion that you can offer me no better processed replacement of the bumper.

I'm considering now whether I keep him and deposition the rubber residues by themselves or whether I return him.

For the reasons above the bumper gets two stars deduction!