This product is ok, but also disappointing. The tablet mount that is comes with, yes, will hold a iPad Pro 11", but if you keep it in any sort of a tough case, things get a little worrisome.
First the controller mount pivot point is kinda floppy. A tool was included to tighten the screw, but you also need a small wrench to hold the nut as it will spin.
Second, you are pretty much forced to use the tablet holder's bottom threaded hole, although the holder seems like good quality it remains to be seen how it will hold up to being used in the field over time.
Third, something that is quite annoying, there is no indexing dimples around the tablet holders bottom hole (the back center does), nor is there a indexing bump on the controller mount itself. This is a problem as with the larger tablet it will want to twist, even with the thumb screw cranked to the max it still will move with some pressure applied, I almost expect this to get worse with use (if the tablet doesn't pop out of the tablet holder first). This leads to the last issue.
The tablet mount grips are not wide or very deep, this is concerning as the narrowness allows the tablet to wobble under some circumstances and since the grips are not deep this can be a potential issue leading to the tablet falling out.
Only time will tell (hopefully with no broken tablet results) how this product will be, but until then, large tablet owners beware.