I haven't used these, but I am using their packs. They are the best packs I have ever used, and I have tried them all. Their quality is excellent. I got 4 seasons on the packs before the rubber started to crack. That's every day use for about 4 months a year. That's about twice the life of any other brand I have tried.
I talked with the folks at Hoffman boots yesterday about their explorer boots, I was about ready to spring for a pair when they told me they only guarantee the waterproof Sympatex for 90 days!
I have HEARD nothing but good things about their products top to bottom. Never owned but a pair of their boots is on my short list. When I have done some looking for boots their boots have came up time and again and I have not heard any real negative things about them. Not cheap but anything worth a damn is worth paying for.