Instruct: Classify the given review into positive or negative sentiment.
Query: Wish I had read the reviews before buying this product

Like a lot others, I couldn't get the PUR water filter to work. With each filter, after barely 1 week, the water stops flowing out of the filter. Instead, the thing keeps leaking, and jetstreaming water all over the place. Initially, I thought if I replace the filter, it would be ok. But after readjusting the base, and trying multiple filters, I finally gave up. I wish I had read the reviews before I bought the 6 pack.