Just got my BMW PE installed and love it! It pops, gurgles and is not annoyingly loud. It's more subtle than most exhausts. If you're looking for in your face loud, then this is not for you. All in all, happy with my purchase.
FYI: the right tip is known to be "off" in terms of look. It tends to point down compared to left tip so they look incongruent. The mechanic had to wrestle around with it but he finally got it straight. He said that the more he tightened the clamps, the more the right tip would point down. Another option is to get the whole thing welded on.
05' RX-8 6MT - Traded
12' 335i E92 N55 Space Gray
BMW PE - Gloss black kidney grilles - Roof wrapped in Gloss Black vinyl