I have a Staintune too. Not sure if you've heard it yet or not, but when I roll off the throttle and let the motor compression brake, there's a very nice rumbly burble you'll hear.
At my age, a little quieter than Yoshi or Two Bros is a good thing, lol. You'll find that the Staintune sounds a little more aggressive under load out on the road than it does when you rev it when the bike is static. Never obnoxious, though, IMO, but just plain classy.
Come to think of it, I'd like to hear my bike in a drive-by. Will have to ask a trusted friend to do a fly-by for me, when I get a chance.