I've been a huge fan of them for years. Some of their tools are a little bit trinkety, but I'd be lying if I said I didn't have some of it in my EDC (tweezers on key ring).
Before I talk product, I don't buy anything there unless it is on sale. They have quarterly, or more often, 20% off sales, and they have seasonal close outs with huge discounts.
Their clothing though, I swear by. No sweat underwear are all I wear now, very comfortable. Wicking undershirts are great too. I had a tailor trim up some of their cool max polos, because they're sized for large bellies. Their duluth flex firehose work pants, and firehose work pants are great. I get colors other than khaki so I don't look so 5.11. I wore 2 pairs for about a year solid, and got a hole in one knee. I thought it shouldn't have a hole, and they honored the No Bull guarantee; so they exchanged the 2 pairs, no questions asked, but for refunds over a year old, they send cash, so I used it to get 2 new pairs. I also love their wind proof fleece jackets, warmest fleece I've ever had. Haven't tried their packs though to be honest, but a couple duffles I've had for over ten years.