I bought this for my 13 year old daughter a few days ago, she loves it. She's made stick ons for her phone, ipod, laptop and for a few friends. It was very simple to use for her age and ability, even my 10 year old found it simple to use.
The only draw back is that there just isn't enough gems and glue stuff. You can get refill packs that come with different templates but it could really do with a refill pack that has lots more gems and the backing glue etc.
We really hope that this brand will be as big as aquabeads and the like, more kits and extras would be great.