I've been using Manfrotto Befree tripods for a while now, and I just realize that they are a perfect tool for my on-set work.
I rarely use them as primary tripod, specially when working with big and heavy professional DSLRs and multi zoom lenses. In my opinion these tripods are not stable enough to support such as heavy pieces of gear.
I mean, they are if you are taking "normal" photos, but in VFX we usually do bracketing all the time. Like for texturing references, or HDRI's. The combination of the gear, plus the rotation of the mirror plus the quick pace of the bracketing, will result in slightly different brackets. Which obviously mean that the alignment process will not be perfect. I wouldn't recommend using these tripods for bracketing with big camera bodies and multi zoom lenses. I do use them for bracketing with prime lenses such as 28mm or 50mm. They are not that heavy and the tripods seem to be stable enough with these lenses.
I do strongly recommend these tripods for photogrammetry purposes when you have to move around the subject or set. Mirrorless cameras such a Sony A7 or Sony a6000 plus prime lenses are the best combination when you need to move a lot around the set.
I also use Befree's a lot as support tripods. They just fit perfectly my Akromatic kits, both Mono and Twins. Befree tripods are tiny and light so I can easily move around with two or three and they even fit in my backpacks or hard cases at once.
As you can see below, these tripods offer great flexibility in terms of height and expansion. They are tiny when compact and middle sized when expanded completely. Check the features on Manfrotto's site.
I also use these tripods as support for my photogrammetry turntable.
Moving around with such a small setup has never been so easy.
Obviously I also use them for regular photography. Just attach my camera to the provided ball head and start shooting around the set.
Finally I also use Befree to mount my Nodal Ninja. Again you need to be careful while bracketing and always use a remote trigger, but having the possibility to move around with two or three of these tripods is just great.
They have two different version (both in aluminium and carbon fibre). Both of them come with ball head and quick release plate. But, the ball head in the smallest tripod is fixed, can't be removed. Which means a lot of limitations because you won't be able to attach most of the accessories normally used for VFX.