Cbtech

I haven't really noticed a drone unless im cruising at 100 in 6th gear (44-4700 RPM's). If you drive in a typical fashion using all your gears correctly you shouldn't get a drone.

I do have a backpack and gym bag in the back almost all the time soo...

for me:

Pros:
Awesome sounds
very mild when at idle. cant tell its not muffled
LOVE the burble when in a lower gear and let of the gas

Cons:
LOSS if torque at take off (has made me want to put the muffler back on)
Price - Went to a local shop in town and had them make the same set up for almost half the cost. (sorry AAM, i have used several of your products on my 350 back i the day and very well made)