Hey, just wanted to share my experience in case anyone else runs into the same.
Yesterday I purchased the ISA Fleet Box Set from Empire. When I opened it and started going through it, I couldn't help but notice that the models, particularly the White Stars, were very poorly cast. Way too much flash, and things like incomplete wings, little spines and guns that weren't as long as they should be, stuff like that. Plus they left out a few things like Nial fighters and a flying bridge.
So I emailed Mongoose this morning. They don't list a phone #, just fax, which is OK because it turns out that they're in England. I emailed Sales (on the Contact Us tab of their site) and told them of my woes. They got back to me within the hour, said that they would get me replacements ASAP (with the caveat that they were just inundated with orders so it might take a little time) and fulfill all the missing pieces. They also mentioned that they were remaking some of the moulds because they were no longer producing proper casts.
So, we'll see how long it takes for that stuff to arrive, but so far they've been very apologetic and customer-oriented (a rarity in this day and age). Don't hesitate to email if something's missing or you get a poorly made ship. They've been very helpful!!
$.02. or I guess ?.02, since they're English.