You get what you pay for.
This is a fair price for an average product. Of course compared to Matfer or Silpat (which I also own) they lag in looks, quality and performance, but they also priced accordingly and I have no complaints there. Below is a run down as compared against "premium" brands:
LOOKS: aesthetically these are cheaper looking than Silpat. They are cut crooked and are thicker. The coating is more rugged and not even.
QUALITY: they're not as durable, but durable enough. I find that they're not as easily cleaned, and you have to keep up with it because slaking off once will result in semi-permanent stains. They do withhold cleaning with gentle scrubbers like dobie sponge pretty well. They must be stored either flat loosely wrapped. If not, the creases will set in permanently.
PERFORMANCE: this one is a pleasant surprise because by the looks of them I didn't think they'd hold up as good (they have been in regular use for about half a year now). I used them in temperatures of up to 450F and there was no smell. Non-sticking quality is okay (just okay), but because surface is not as smooth as silpat or mafter they will transfer some texture on whatever you're baking on them and will cause some friction - nothing "slides" off, you have to "peel" it off. There was no smell when I first started using them.
VERDICT: if they're on sale, it's a good value, and you will get what you pay for. They're not terrible, but not great either. Just a fair generic product with average performance.