I got one of these, hoping to use it to film multi-cam for a Youtube series I work on. Alas, the Mavic is pretty noisy for an "on the set" situation, so I gave up on that. Also, there were some additional challenges[1]. But it's a nice rig if you don't plan to simultaneously capture (non-extremely-isolated) sound from nearby and don't have another camera to use - pretty sturdy, and a comfortable way to walk around with the Mavic in your hands.
[1]: To do non-pro multicam well, you want a good scratch audio track captured from each device too, but the Mavic obviously doesn't capture sound directly. So you end up fiddling with the 720p "cache" footage, which has the right sound, trying to sync it exactly to the native device footage, which does not. At least in the couple of experiments I did, this was not easy, and it seemed like there were a varying number of "leading frames" (AFAICT, the Mavic always captures a few more than the local cache) to correctly sync the Mavic video and the cache video. This is probably related to the encoding/transmit delay, and the local cache just slapping "now" audio onto whatever it's getting from the video transmission, but, being that it's not something that's being handled for you, it's going to be a pain for any multicam usage. May as well get out the old clapboard and just sync the multiple sources visually.