I found a few samples of these that I ordered a few years back. They are available on Holdem PC. I have never heard anyone talk about these. At only 19cents/chip what say the masses?!
Not bad chips, but pretty light. About 8.5g, IIRC. Casinos used to use them for free play or roulette chips, or occasionally fractionals. No recessed center for labels, but they can be hotstamped. Good selection of colors, good price, but just a little on the light side.
I keep hearing how slick they are, but mine have a lot of grip. I really haven't used mine for more than a few games, so maybe they get slick after a moderate amount of use?