Are these shoes any good? I was thinking of getting a pair for work as I don't currently have time to go to the gym but can easily walk 10,000+ steps a shift when I'm at work and anything that helps tone my legs and bum would be very welcome. Obviously when things calm down a bit more at work I'll be able to add in a couple of visits to the gym a week as part of my regime, so I'm by no means looking for an easy fix.