Versatile, compact, but quite powerful and easy

As some have written here: Grade the two most important elements are of the worst quality:
1. The first device was a few months (and hardly in use) the ghost: Battery defective
It came about Warranty Processing (duration ~ 6 weeks!) A replacement unit

2. The replacement unit came already (!) With zebrochener valve-locking (which is from "billigstem" bröseligem plastic) at us. The "new" products seem even worse than the 'old', ie from the batch that I had first. So again contacted the service.

3. Warranty service may not deliver the device can be its functional and therefore offered a return of the purchase price.
By pointing, quote: "A return of the purchase price can be made only via the dealer, if you so choose, you need to contact the seller."
Fortunately, Amazon has the Got.

The 2nd star is sure that if you would not blatantly save at key two points to a truly could top device.
Deviation from the image: For the rest, the two fronts is not from gray / silver plastic, but also black.