Ya, they're designed to mimic the Casino De Isthmus Paulsons. They are pretty good for a third the money. I liked the non-denominational because I didn't like the color order of the 25,100,500,1000 chips and it allows me to run different sorts of value games.
I did the 25,100,500,1000 setup (with 8/13/7/5 for T10,000) last weekend and it worked out OK. The second round we just did T5000 dropping the 1000s and it was pretty good too (probably do that in the future). After reading a ton about chip stacks, I think that worked out pretty well. I got some guff from one of the guys who usually plays 5,10,25,100 but I think it's just more about chip efficiency what the values are. I want to try a round of 5,25,100,500 sometime just to see the difference and I think not having denominations is better than having them and trying to tell people something that doesn't match (but I guess that would just mean I'd need more sets of chips right?). I learned my lesson switching out blacks for grays the second round and that was much too confusing. (and I sort of knew it was going to be a problem)
I think I'm going to try and label a few and see how that goes.