Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor Design

The first thing I noticed when I tried out the Maxi Backsie was that it pressed hard against my spine, which I consider very bad, esp. for the lower spine. I wouldn't want to whittle it down, either, because there would not be enough wood to withstand much weight and it's made of two pieces. I'm quite thin; maybe a fat man wouldn't mind the pressure.