Not sure I'd be so happy about being able to hear the turbos all of a sudden :O.
That said, it's certainly a service that's well worth looking into if you've got >50k miles on your car. and at the prices that people on this forum have been getting from UBS it's almost a no brainer.
I did my own blasting when I had my coupe because I couldn't stomach paying $600+ to a dealer or indy for what's basically some nut shells and a bunch of labor. After doing the job though, I think I'd charge more than $250 if I was to open my own shop, so in my mind that makes their service a heck of a deal.
I may have to drop off my car sometime and let them blast away!