We operate a Pierce rear mount platform and a tiller. While both of course have advantages, I like the platform for the following:
1) Good area to work off of on the crappy truss roofs all over the place these days.
2) Nice place to put saws, tools, etc on peaked roofs.
3) Easy to attach safety lines to for roof work.
4) High payload. (Almost all makes are 1000 lbs or so.)
5) Excellent to remove frightened, elderly, or injured civilians. Very difficult to remove a patient down a stick for example.
I do prefer a rear mount platform, I like to see the platform in front of me while driving. A mid mount with a long overhang concerns me with the bucket swinging out in sharp turns. With that said however, I still think the Aerial Scope is one fine piece of equipment. And as good as our Pierce has been, I still wish we had one at times!