I haven't done it at all in pf yet, but I have about 12 clears now with the group of friends I've been running it with and not one of us has gotten a mount drop. Not one in 40+ rolls. I actually really love the criterions - I think they are fun, creative and well designed and wish more people would attempt them, but the drop rate of the major reward is atrocious for something that takes 20 minutes to clear minimum with no deaths/wipes. Because of that I truly cannot recommend that anybody really bother unless they're in it for the long haul of doing 29 clears to buy all the items or want the savage weapon designs. They've absolutely killed this genuinely fun difficult 4 man content with a reward as rare as an extreme trial mount drop when it takes on average 3x longer to clear even when you don't wipe! It's tragic.
We are going to keep at it and do savage within the coming weeks for the weapon glamour and then be done with this forever, probably, unless some other friends decide they want someone to teach it to them.
My recommendation is the same as some other people here: you should get a group of friends together to complete this. I never would have bothered if I had to resort to party finder.
