The only tip I would give is to order a swatch before ordering a bulk of dresses. I ordered the dresses in pink thinking that the colour would be much lighter than it was. I didn't realise I could order a swatch. I contacted customer services about the colour issue and they were extremely helpful and answered very promptly.
The dress arrived and it's gorgeous! It fits perfectly, except it seems it's been made floor-length instead of tea-length... The material is thick and sturdy, the bodice has great structure... i might get the bodice taken in just a wee bit.