Even a little disappointing

On the occasion of the purchase of a new microwave we thought also about a new accommodation derselbigen. After a short search we chose this wall mount. In the photo she made a strong impression and also looked quite appealing, get so quickly ordered and delivered in no time.
When unpacking be first confirmed the impression of the picture, sound and nice ausschauend.
Then drilled by four holes in the wall and, first surprise, the screws were neither cross nor screws but with a wrench to screw. I had, of course, not directly at hand, ie matching key concern and pure turned screws, where especially the last centimeter pose quite a challenge, because of the limited space in the rail.
But then it did very well in the wall, so nothing can go wrong, I thought as I sat on it the microwave. Here you have to but sure to observe the very small wells, where enter the feet of the microwave. For my taste, these depressions are a bit too flat, so that the feet can slip out of the microwave quickly.
The biggest problem, however, is that the right pull-out arm flexes downwards. After a short time our microwave would therefore a right-skewed and in only very shallow troughs.
The problem I first resolved by washers which I pushed from below into the extract of the right arm. Now the microwave is back straight, let's see how long.
In my view, goes something like this at all. These arms should indeed support the weight of a microwave, but they have been so designed finally.
If the arm bent back, I send the thing back.