Have any of you ordered from Dancewear Solutions?

I'm planning on ordering from there but I am scared about sizing... Shipping to wear I live costs $80, so returns aren't possible. I measured myself and I am inbetween a MC and a LC. I like my dancewear to be nicely tight but not super tight. Should I get a MC or a LC? Also... I'm 12 and small for my age would these sizes fit me? Im planning on getting shrugs, leotards, footundeez, accessories, shorts, sweatpants, and jackets. So... what size should I get?