Years back I purchased the first gen cotton twill blend, I liked them a lot but the material just didn't hold up on the knees. I seen the whole design changed and decided to try out a new pair.
So far this new design is a durable product and have held up well the past 2 months they show no signs of fraying, I do property maintenance so I am using the kneepads pretty much all day troubleshooting systems/crawling in my work van digging for stuff.
Pros- comfortable, fit is good and the stretch is nice. Plenty of pockets. Good reinforcement.
Cons- material is a bit thicker and not as breathable. Due to the thickness required to make these rugged I think it also retains odor a bit more so I wash every 2 days. There is plenty of pockets but no large cargo style pockets obviously.
Not a con but a personal preference, if there was a streamlined cargo pocket design with 2 cargo pockets on each leg and no pen pockets/hammer hook, I would definitely buy a pair.
For the price you get a really great product.