I installed the canvas squares behind a huge stained glass window (I have pictures of all phases of the project). The mounting kit was an easy install. If you are not doing a freeform installation, make sure that the little arrows on the inside of the mounting squares all point the same direction (I used down and to the right). After mounting the first mount, put the control square in to verify that the orientation is correct, or you may have to stand on your head to read the buttons :-) There is only one orientation of the nanoleaf to the mounting square that will work. If you are off, the canvas will not stay in place and you could get grumpy when the canvas falls off the mounting! You will have to verify the proper orientation for each Canvas square you place. In all cases, do not rush, take your time and verify that each suqare is in the proper orientation.
In terms of time and effort ... for an 88 square canvas install, the start to finish time was 6 hours. It works amazing and is way better then adhesive. The end result was sweet and well worth figuring out which direction the little arrow should point.