i have ordered from ideeli a few times. like others, i was fine until i had a problem.
i bought an RM bag pictured with signature hardware - it was a waitlisted item and they decided to produce a bunch for the waitlisted people. i received it and it didn't have the hardware pictured in the photo. the listing did not say anything about what was being sold might differ from the photo.
i wrote to them the day i received it to tell them i was unhappy - it took them three days to respond to say that CS would contact me. more than 2 weeks later i hadn't heard from anyone else at ideeli, so i wrote again. no response.
about two weeks after THAT, i wrote to a different email address and they finally responded - i threatened a chargeback at that point. but all they said was, "Thank you for contacting us. We are sorry to hear that you feel your item was not as advertised" and offered me a return label, which i could use to return the item so that they could "inspect the item to determine whether or not it is actually not as advertised. If it is, we replace the item if it is in stock, if not we will issue you a full site credit... We will contact you to let you know our decision about the error." Never said what happens if they decide that it's not their error.
i ended up selling the bag instead. i wasn't going to deal with their bs.
i don't think i've bought from them since, although i do look at their merchandise sometimes. i love gilt and will keep buying from them.