My experience with VFFs has been limited to KSOs, Bikilas and Komodos; in addition to Merrells, NB, NB Zeros, etc. I found the Komodos to be somewhat overly stiff and lacking in feel, your mileage may vary of course. The treks were going to be my next pair but I got another set of Bikilas instead =).
The KSOs are awesome, but for trail running specifically they where painful; either catching a sharp rock on the arch or heel. The Bikilas have been perfect in the sense the they offer a little arch protection (not support, just a thin EVA pad) and just the tiniest bit of cushion throughout the foot. So you feel the impact bit its more protected form the pain.
My Bikilas are my primary lifting shoe, although the KSOs might be a slightly better choice for lifting specifically, due to less heel cushion. But I have no issues given the relatively small amount of heel cushion form the Bikilas.
"Go For Broke"
Fat Kine-230/24% @ 6'2"