I've used them multiple times (both new and previous ownership) with no issues. I think the OP should provide more details to support his blanket boycott recommendation. I also want to hear the retailers side of the story before I pass judgment.
I agree, that is really nice work. I'd like to know more specifics, i. e., what parts were used, etc. Are you building a specific car or a generic representation of a class of race cars.
This may be an option also: https://www.bnamodelworld.com/model-cars-motorcycles-parts-decals-ka-models-ks-00009?zenid=300e78504a380d94d0c7d218953a9a2b
That's actually a very reasonable explanation. I was concerned that you might be some kind of airbrush hoarder. Best of luck toward getting some finishes that you're satisfied with.
You folks sound like some pretty savvy small ticket luxury item shoppers. BTW, e bay has a money back guarantee policy: https://pages.ebay.com/help/policies/money-back-guarantee.html