I never had any problems with packaging the few times I've used them, although they were much smaller items than this will be. I do trust their packaging more than Nippon Yasan, but that's a low bar to clear.
Packaging aside, AE did earn itself a reputation for nonexistent customer service and outright taking people's money without ever shipping their order. That latter issue was not something that seemed to happen a lot (they aren't Premium Collectables), but it did appear to happen frequently enough, that I won't ever use them for items over $100 USD, even if they have a much lower price.