I've had mine for about 6 months now and love it. Am contemplating doing a x-pipe to get rid of the secondary cats and mufflers, but just not 100% on if its going to be too loud.
I don't get drone, but then even if I did, it wouldn't bother me. I agree with the highway remark, its got enough noise but not enough to be annoying.
Exhausts down here are ridiculously priced, so the Megan was a great option.
.: 2010 E71 X6M - stock, daily driver, towcar :.
.: 2008 E92 M3 - 6MT, Carbon Roof, Eibach Springs, Megan Axle Back exhaust :.
.: 1997 E36 323i Frankenstein - too much to list, track whore, stripped, caged, MoTeC, S85B50 :.
.: 1994 E36 M3 3.0 - 19" BBS LM Reps, Bilsteins :.