OK - quick update on my personal experience as, like many others in this thread, I was sceptical of the sense of using AliExpress and was concerned that it seemed too good to be true.
My first order was from the Kegland store for 3 x Blowtie 2 (the new ones with the inbuilt gauge), 3 x the new inline regulators, as well as the lid removal tool.
I ordered it on 20 July and it arrived today, 9 days later. Box was fine, if a bit beat up, but everything was separately packaged inside as well as wedged with extra bubble wrap so no issues with damage. The products are definitely the same items and not some clones or knock offs.
Total cost (with postage): £59.51
Total cost if I bought then from UK retailers (before postage): £144 and that doesn't even include the cost of the removal tool as I couldn't find that for sale separately in the UK.
Make of that what you will, but I've got every intention of using Ali Express again. I've got other orders currently processing so I will see how I get on with them.