"You took my daughter and son-in-laws vague ideas and made them into a fantastic reality"

If there was a word for more than unique I would use it. Exceptional attention to detail both in the art work and the quality of the cake. AS for the price, well now we had ours I think you could easily double what you ask and no one would quibble.
If you ever do cupcakes in the lemon, ginger and whisky put me down for a dozen.