Looks pretty good...but will these other options A) hold up to 15 pounds with the same stability, and B) also allow for remote operator to pan/tilt with a well integrated system?
Home-built or low cost tools are great, and definitely should be encouraged and often turn out great work, but I hesitate to say they are usable for the majority of film makers, especially not for ones with any serious amount of budget. They will be attracted, in general, to very well made, very well supported, and known and trusted tools. The Movi meets the first one, so far seems like it will meet the second, and with Vincent Laforet endorsing it, it has a very great start on the last point.
agree, DIY solutions lack the level of support I would expect from a solution that costs 15k. but its certainly worth a look for indie film makers on a tight budget because you can get the same results for a fraction of the costs. I wouldn't be suprised if this gimbal was actually inspired by the recent developments by DIY projects such as the one from Alex Mos.