I already had a 50mm f/2.5 macro which was very sharp, compact and handy for portraits as well as macro. However it used to annoy the heck out of me having to switch between manual focus for macro and AF for everything else!
The EFS 60 doesn't disapoint in any way. it's brilliantly sharp (a touch sharper than the 50mm f/2.5 macro, especially at full aperture) and solidly built. it has a similar apearance to my 10-22 but feels better constructed to me. It's slightly chunkier and longer than the 50 macro, but doesn't extend during focussing, so overall is probably just as compact.
Full-time manual focus is perfect. The USM operates silently of course and being able to focus to 1:1 is a welcome benefit.
This lens is good value in Australia, being only slightly more expensive that the 50 f/2.5 macro and exactly the same as the 50mm f/1.4. In other regions it seems to be closer in price to the 100 macro which put's the 60 at a disadvantage in my opinion.