Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A BIG mistake!!

[[ASIN:B000X9P5GM Super Curcumin, 800mg, 60 vegetarian capsules]]I should have specified the newer Super Bio-Curcumin, which, I believe, is an improvement over this product which does not have the sustained retention time of the more recently developed product, Super Bio-Curcumin.Correct me if I'm wrong.