It the past, I bought tons of new (mostly tan/blk) Cheng Shin/CST tires for all my flips, as well as for some of my own bikes that I did not ride as hard or as often. I was pretty satisfied with them, given the price, and the tolerable ride quality.
Lately though, I have been plagued with separation in the bias plies and seams on several tires that were practically new. (I do not over-inflate my tires: I set them to 80psi with a gauge.)
The problem is initially evidenced by some waviness, or a little "wow" in the tire, as if there was a warp in the rim. This is actually indicative of a separation, and it can rapidly become a big bulge, and then a big "bang". I had a couple blow outs on the rear before I became much more wary about regular inspection, and today, I noticed yet another - this time a front tire, already starting to separate.
I am not posting this to vent: This is something that can affect your safety as well as your pocket book.