I already have one for use in the house, and needed another for a chair which is being upholstered for me. Happy to have found this one more affordable than elsewhere, and it arrived quickly, with no fuss.
It does the job of allowing me to sit a lot more comfortably than I could otherwise, due to Coccydynia and spinal issues.
The best cushion I have used , the cover isn't really anti slip though. Does wear out after a while if you using it a lot which is a bit of an issue as I think they are far to expensive. Also regarding the cover, it's a nuisance to put on! You have to fold the cushion a bit and that risks splitting it.
It's for my wife's wheelchair as she spends a lot of time in the wheelchair and wanted something a lot more comfortable and this fits the requirements perfectly