Does anyone have any experiences with one of these? I realise sit-ups and other traditional exercises are probably better but think I'd use a thing like this while doing my usual things after work, alright tv.... Now I know these aren't for everyone but suspect it may be suited to me. I've lost at least five stone and fairly stable now at a weight I'm happy with but the legacy of the old beer belly is a bit loose and flabby around the gut, do you think a slider tone may help? They seem pretty cheap these days do haven't got much to lose. Thanks.