The product listing is marketing. The seller is the thing to assess.
Clothing and shoes are sized for the Asian market and generally run smaller than UK equivalents. Ignoring this is the most common reason a first AliExpress order disappoints.
Set these before you order, not after. The method chosen at checkout decides almost everything - see delivery times for the ranges, and tracking for what the statuses mean once it ships.
Most problems are recoverable if you act inside the Buyer Protection window. Photograph everything on arrival, message the seller first, and open a dispute before the deadline - the full process is on the refunds and disputes page.