Don't be taken in by these, they're poorly designed with too-large stones. I do this stuff as a hobby, and know crappy when I see it. Stick to NYC Peach if you want it done well, or find an independent craftperson, but don't be fooled by the Bling Ring kits or these guys. Even the Jennie Oz phones aren't great, she cheaps out and uses large stones.
You can tell if a designer is cutting corners by the size of the stone (2.6 mm is really ideal. these look like 3.2 mm) and the pattern used. Shifting each line by one-half stone width maximizes the number of stones and allows for nice, crisp designs. These guys line the stones up one on top of the other, which leaves too much space in between. They also place stones very irregularly, which looks sloppy.
It's not hard to do yourself, just takes patience and time and a little practice.