I was very pleased with the sound of the exhaust. You'll hear it on start up. Once you're driving, it's quite subtle at normal cruising or very gradual throttle. Once you give it gas and it is over 2/2.5k rpms, then especially 3/4k+, it's very present. My Tacoma is stick, and the little gurgle it makes shifting from 1st to 2nd makes me smile every time. If you are cruising on the highway and come up on a steeper incline, you'll hear it. When you want to hear it, it rips, as expected by the lack of baffles. If you want this, like I did, then it's great :)
Warning: while the exhaust flow may improve fuel economy, the effect on driving habits is likely to decrease fuel economy!