I've put these on my bike 1k miles ago, I like them a lot, good in the rain!
I use my bike for a 60 miles daily commute to London! Very stable a three figure speeds as well.....
Haven't tried two up, but I carry quite a lot of weight in my top box, and they are very quite.
You don't need to ride them in either! well I didn't.....
M
I've been considering these for my 1150GSA so your wee review is quite timely - thanks!