Not had an Issue!
We have been dealing with Aliexpress for a while and besides the occasional hiccup here and there its gone rather smoothly! Your Money which you pay for items is held until such time as you confirm your delivery has arrived. DO NOT accept if there is any problem with the item :) once you accept then you may not always find a seller willing to fix an issue... but not all sellers are like that :) ... In one circumstance there was a mix up and we were promptly refunded our money. All in all not that bad a place to deal with :)