I ordered the seatpost together with a MTB carbon frame from this seller. At first the communication was good and I received a tracking number that should confirm that the items were sent. After a few days the tracking showed the status "canceled by seller". I asked seller why it was canceled, but got no answer. After a month with no goods received and no communication from seller I opened a dispute and got the money back from AliExpress.
Fast and easy. I recommend the salesman.