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it worked ok on my chest, best shave I ever got there though it wasn't as close as a regular razor. I tried it on my stomach (I am quite round there) and got the worst cuts I've ever gotten. thankfully they weren't painful. If you're flatter I reckon it would work better but for me I'm not sure it was/is worth the money.
Impressed! Makes it quick. I still keep a small razor in the shower for areas where it is a bit tougher to get into, such as the cleavage between my pecs. Instead of running it over many times I just go in with the razor to finish it of.