Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: product functional; installation a problem

I was pleased with the quality of the threshold ramp. It was exactly as described in the listing, arrived on time, etc.However, the threshold to which I wanted to attach the ramp is completely covered in ceramic tiles(inside and out). The product is designed to be screwed into wood (or perhaps concrete). My solution was to attach industrial-strength velcro to the threshold and ramp. This seems to have worked (I was concerned that trying to drive screws into the tiles would crack them, so elected not to proceed down that road).