"I recommend buying a craft bin to separate and hold all of the stud pieces when building. I bought one for three bucks (Lego should have included something in the set to at least store the pieces that are not in use).
As another reviewer said it is like painting by numbers and if you find that to be a relaxing activity then you might like this set. I believe the intention is to periodically change the image and experience the "relaxing" process multiple times.
I think it is overpriced for what you get especially since you can only display one image at a time and the set is made up of mostly stud pieces. Plus in order to do the mega build you have to buy multiple of the same set. A practice I haven't been fond of to be honest. Furthermore doing so would carry a larger price tag than most of Lego's recent adult theme builds.
If you plan on doing the build multiple times as a way to relax . I say you should go ahead and purchase. Otherwise you may be disappointed in only being able to display one image at a time and not being able to do the mega build without additional purchases."