The is much debate on what is the best camera mount to buy, and, in actuality, nothing is perfect --yet. That said, the MKTr is what I bought, so, I will try to do the best I can with this mount and tweak it until it works the best that it can.
Note: If you intention is mostly photography and not video, you will have much less difficulty with the calibration and setup.
The MKTr platform is relatively easy to assemble, although the takes a few hours. The attached manual is quit thorough. There are other quality mounts, but, I bought this one primarily for it's light weight.
Here is the Photshipone Website