Only the rear floor mat on the driver's side of a Golf IV 3-door (!!!) requires a little fiddling until it is in the correct position.
By the knobs on the bottom the rear mats are even without the provided mounting rings fixed bombs and not slip under the front seat or somewhere else. The front mats fastening rings will fit very well, going a little difficult "to click off", but it holds at least as well! :-)
From me therefore a very strong buy recommendation!