Instruct: Classify the given Amazon review as either positive or negative.
Query: Avoid this product

A lesson learned.I purchased this product in the 50 pack in August, so I would have it when needed. Unfortunately, it's now passed its return date. In the future, I'll test several writable DVDs from a pack, as soon as I get it.So far, I've tried 16 of these DVDs. Eleven were unverifiable. That's nearly 70% coasters.Junk.