Painful. Tried to adjust settings (which are very difficult to read) to prevent this. Gave up after the third attempt. Will never use again. Wasted money - which is substantial for people like myself with very limited resources, but, spent the money in the hope of relief. Failed in that attempt. Not heavy enough for a door stop, so, it will just end up in the trash at some point.
I have arthritis and trigger finger syndrome in both hands AND I’m a hairdresser. My hands always ache and hurt but this machine is a lifesaver! It makes my hands feel so much better!