trekkers are too much of a headache for the roughly $100 you'd save.( i think thats what the kid who said Trackers meant?)
The mfd is a pretty substantial plate and with fks and mfd's, your hip flexors/legs in general are going to be hammered with much uphill. I personally have the duke, and while I dont love them, they do the job fine. Its a lighter set up (not by too too much) but I have the same confidence on a pair of dukes that I have on a pair of alpine bindings.
I also wasnt inlove with the pivot point on the mfd. Felt like an unnatural-ish stride compared to the duke. Might just be because I was so used to the duke while trying the mfd.
Another thing AGAINST the BCA Trekker is that you need to put them into or onto your pack for the way down. For me, having my skins, water, shovel, probe, food, med kid... AND alpine trekkers in my pack on the way down was too much. Shit was over packed and uncomfortable.