I have specialized roubaix pro's. probably 4000kms or so. the back is squaring off nicely, but the front is pristine. I ride them usually at 90-100PSI, and they are the 23/25c model. my commute is some road, some footpath, no grass, about 14kms. they hang off a poorly kept but trusty commuter bike with an early 90s chromo roadie frame, mixed shimano groupset (4600 shifting) and halo aerorage wheels
I previously had used Gatorskins (alround good, one got torn up by really nasty nails), GP400s2s (fantastic feel and totally acceptable puncture protection, but eventually got unlucky and punctured) and have Duranos on another bike. I put the duranos between the roubaix pros and the GP4000s for feel and they perform well.
back to the roubaix's, key points are
NO punctures 4000 ish ks of commuting
1 pinch flat - totally my fault, bunny hopping my 95kg frame over a kerb with 70ish PSI tyres. duh.
Subjectively, nice smooth, fast ride
Set and forget tyres really
I had read about the early ones delaminating or something. hasnt happened to me