Well, the passenger side one is fine. But the drivers side, being both too thin and not very long, bunches up everytime i leave the car...ridiculous. I mean a large hump forms, right side in front of the twist latch as the right foot pivots to exit. if they were heavier, or longer no issue i suspect. First time i have ever experienced, and have had many sets of manufacturer rubber mats.
With the reinforced eyelets in the Lexus all-weather floor mats and the locking hubs on the floor of the car, I'm trying to imagine how the driver's side mat can "bunch up" as you describe, unless, as you pivot your foot, your shoe is pulling the front of the mat backwards.
I have had these Lexus all-weather mats in my CT for a few weeks now and have never encountered a problem with the driver's side mat bunching up, possibly because my tendency is to push the front of the mat forward with my right foot as I exit the car. Seems to me that the two locking hubs would make it virtually impossible for the mat to bunch from any lateral (sideways) force without tearing the mat or breaking one of the hubs.
As for the mats' thickness, when I reinstall the driver's side mat after removing and hosing it off, the locking twist is snug when I turn it to lock the mat into place. If the mat was any thicker, it would be a real chore to lock the mat to the floor.
I have always replaced the OEM carpeted mats with all-weather mats in every car I have owned (too embarrassed to say how many over the past 50 years). And these Lexus OEM mats with their locking mechanisms that keep them in place like those in my '06 MDX are a godsend.
Each to their own, of course, but speaking for myself, I am very happy with the Lexus OEM all-weather floor mats and feel they were well worth the $89 I paid for the front and backseat set of four (see photos of the front mats below).