“I'm sure this does a job for some people but my chair didn't have a hard back so the cushion was constantly slipping and falling down the gaps. If you can get it to stay in one place it would be excellent.”
“This is a comfortable cushion that I think is helping me manage working at home on a rather unsuitable kitchen chair. However, it seems to be designed for a larger chair as the strap does not quite go tight enough which means the cushion slips down whenever I get up. So it's a bit annoying, but not a major issue.”