Bests & Worsts Reviews from Amazon

The product itself works exactly as stated by other reviewers. I can’t attest to longevity but as a Finger picking guitarist I need to file my nails often. What has me perplexed is in the description it states; it is made from czech glass and to avoid knockoffs made in china. This a was an item I ordered thinking it would arrive in a couple of days. once the order went through I received an email stating I would receive it anytime from April 15 to May 10th. I placed the order on March 26. When I saw this I immediately tried to cancel the order. I didn’t receive cancellation of the order as normal but a few days later I received notice that my order was shipped from china. A day or two after that I received an email informing me they were willing to forgo shipping charges if I didn’t cancel the order. The nail file had a made in czechoslovakia sticker on it however, the description’s first bullet said do not buy knockoffs made in china. the product works well for now but long term I don’t know. my rating i solely based on deception (real or perceived)