Mine honed up nicely and I finally got round to shaving with one yesterday. Started well, seemed very sharp at first. Got tricky around the chin ATG, but that may be because I'm not used to using a singing razor, or maybe it's not suited to coarse hair.

Don't know if these are classed as true singing razors, but they do make a delightful pinging sound when they cut through individual hairs on your arm. If Gilette made their multi-blade cartridges from similar blades it would be like operating a music box as you shave.