There's a nasty surprise at checkout, isn't there? For me, a 6-item cart of about 18€ (12€ with coins, probably 10€ with a discount code) gets hit with an estimated ~21€ in customs, so right now, AliExpress seems dead for stuff like that.
They've also done away with the "you'll be reimbursed if it's actually less than that", so either their calculations are better or they're happily pocketing the change if the package isn't pulled/taxed lower.