I am a construction superintendent in Arizona, and have long used the Ecotrek pants as my daily wear for work. The time came to go up in size (whoops...) and the relaxed fit flex pants had just dropped, so I gave them a shot.
I have two minor complaints. These pants are slightly roomier than my preference in the thighs, but only just. I am 5'10" and just shy of 200lbs, with an active build. Someone else might find the extra room welcome. They are also about two inches longer than I would expect a 32" inseam to be, as odd as that sounds. I haven't measured them, but they just feel too long, to the point where I will have to get them hemmed.
That being said, these pants have been a pleasure to wear, even in 115 degree heat outside for hours at a time. Love the roomier pocket on the left side with the reinforced bottom seam (my ecotreks failed at that seam often).
I will likely continue buying these same pants to fill out my work wardrobe, despite the issues above.