The bumper fits nicely around the Q10 and does not fall off. The Material is rather solid than soft. The front half of the bumper has a matt and the back half has a glossy finish. I like the matt one more because the glossy side easily gets small scratches and dull spots.
The buttons on the top an the side are fully covered by the bumper but can still be pressed with some effort.
Considering the low price this bumper is a very good deal and I would buy it again.