When I bought mine early this year, IndySuperBikes had the best price. I'd never done business with them (frankly had not even heard of them) prior to this purchase but the price and speed of delivery was very good.
I really like the sound and look of them, so in that regard I'm very satisfied. I got the polished ones. Good deep throated sound, without being loud and obnoxious. Not too loud on the highway, either. Great appearance the blends very well with the bike. Fit was excellent. Sounds phenomenal when the engine is rev'd to 4000 and above. Product - Great.
On the other hand, one of the mufflers arrived with a 1" dent on the bottom side. The package was in perfect condition so it was clear that it was packed at the factory with that dent. The mufflers also came with the wrong size (too large) clamps. That was a time consuming effort to get resolved. The V&H customer service guy was nice enough, it's just that things were slow to happen and required too much follow up. I've heard several other stories of people having received their with the wrong clamps as well, so it's certainly not an isolated case. Customer Service and Attention to Outgoing Quality - Poor
I would still consider getting them again, but would insist that the retailer check the parts first to make sure they were correct and undamaged. I would consider some other muffler options as well, including the ones from the UK that people are looking at lately.