I've heard nothing but good things about their mufflers. Listen to the setup inside and outside of the car before you buy, if you can. This is only 1/3rd of the exhaust, but it can drastically change the tone and sound of the car when accompanied with an h or X pipe, and vice versa.
Mufflers aren't a good source to free up HP, although they do slightly help, so pick out a catback based on sound preference and not the flow numbers they try to sell you on.
Good advice Phil....I've heard only good about Bassani but the mufflers don't sound good at all to me. They are great quality...it's just the sound I don't like.