In the past year or so, I've ordered one set from BRPro and one set from Tina.The difference in quality between ABC / BRPro compared to the CM chips was really obvious to me.
Everyone will have different opinions but I think that the ABC / BRPro chips are worth it.
I bought from BRPro because I know that I get high quality chips from a vendor who will stand behind their product, and a guarantee that they won't sell the same chips on Alibaba the next week.
I bought from Tina because I could get a big cash set of a long-closed casino design (New China Club), and I will never in this lifetime own a playable set of the originals. So far I've had no issues with quality, but at the price I paid, I'm willing to take the risk that they might wear out and hit the trash can much sooner than a set from elsewhere.