I bought a Santorini wall mural for our kitchen after seeing it in a wall mural book at the store. We placed an order and it arrived in about 2 weeks. It was perfect. The guy at the store did tell us that we could do it ourselves but he probably has never done it himself.
CONS: * rips VERY easily once paste is applied;
* instructions say to "overlap" so that you don't see the seams and to cover up gaps however there is no room for overlapping otherwise pieces don't match;
* once piece touches the wall that's it, it is stuck, don't try removing because it will rip
* instructions say not to worry about "air bubbles" however if you leave it, its there permanently
We followed the instructions to a T and still it came out bad. My husband says that he never wants to do this again even though the friend who helped said it didn't look that bad (it's also not his wall). All in all, it was a lot to pay for a lot of effort/work (took over an hour) and very little reward. For the time being we have decided to keep it on our wall for lack of a better alternative.
If you insist on purchasing this wall mural I would highly suggest having a professional put it up.
I would recommend the store but probably not the wall mural.