I purchased the Tackform MS100-TAB to mount to a cymbal boom using the Girbraltar Shockmount Mic Adapter for cymbal stands to hold my tablet while drumming. The entire setup is sturdy. I particularly like the fact the Tackform does not take excessive effort to expand the clips to insert / remove the device. Likewise, it is not putting excessive pressure on the device (with cover) while holding it. I used the small and medium legs for my 10 3/16" x 7 1/8" tablet (with Pelican case). The combination of the boom and ball mount on the MS100-TAB allow for an infinite amount of adjustment and placement of the tablet.
I looked at similar mounts and felt this had the best price / build. I don't recall seeing it in use with a drum kit, but the positive reviews left me with little doubt it would provide the flexibility to place the table where I wanted within the drum kit.
The postal service stopped reporting progress on my shipment so I contacted Tackform. They investigated and said if no progress was reported the next day I should contact them. Much to my surprise Tackform proactively contacted me the next day to let me know USPS posted an update. I have to say that is going above and beyond and was totally unexpected.