You're in luck, I've been meaning to do this for a while now, and I had to go pick up some take-out right after reading your post anyway, so here you go. Sorry for the lame visuals, I just set the camera on the seat while I was driving. First half is w/ windows down, and second is with them up. While it may seem loud in the vid, keep in mind I have an intake that's adding to the fray; if you compare it to the surrounding sounds (keys, birds, wind, other cars, etc.) you'll notice it's really pretty quiet in comparison. In fact, it's not much louder than the stock piece -- just more bass down at low revs while gaining some volume at ~5k+. The performance gains are nice as well, and worth it just for that alone.
YouTube - USDM Fit w/ J's Racing 50RS axle-back, City Driving