It's taken a while to get used to it, my back was aching for the first few weeks but eventually you stop slouching and sit properly. This thread made me realise that I haven't thought about my back for a couple of weeks now and I sit on this thing on-and-off for more than 8 hours a day when working.
I have one of these: https://www.formyoffice.co.uk/products/dynamic-sitall-sit-and-stand-stool
It's taken a while to get used to it, my back was aching for the first few weeks but eventually you stop slouching and sit properly. This thread made me realise that I haven't thought about my back for a couple of weeks now and I sit on this thing on-and-off for more than 8 hours a day when working.