I've done about 150 miles worth of commuting, 18 miles/day, so far on the Imperial and it's much more comfortable than the B17 I tried. But then again: anything would be more comfortable than the B17 I tried

OK, it's more comfortable than my midrange WTB saddle too. I may go for a two week tour next week and I'm thinking about taking the Brooks saddle. I still need to tweak the position a bit but it looks promising. It definitely makes riding in normal clothing much more comfortable.