I allmost bought one of these 2nd hand earlier in the year but the price was a little too high for me at the time
I've seen some excellent shot's taken with this lens around the net so I agree it's an excellent macro lens, I've also seen excellent shot's taken with the other lenses in the same range from Canon and Tamron all of which get very good reviews aswell, safe to say whatever one you go for your on to a winner.