Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst reservoir ever.

I was pretty excited to receive this bladder. I thought the center baffle and the large opening were good ideas. Don't buy this reservoir. First, I took the neoprene sleeve off to save weight and the hose immediately turned a sick, yellow-brown color. (From sunlight?) There was no funky taste, but it looked like I was drinking urine. Don't buy this reservoir. The bag itself is now turning the same gross color. Don't buy this reservoir. Also, I don't think the center baffle is narrow enough to do much good. While the large opening is good for cleaning, as one of the other reviewers mentioned, the rolltop closure leaks. Don't buy this reservoir. So now the bottom of your pack is wet. Bend over to adjust gear, and now the top of your pack is wet. Don't buy this reservoir. And finally, the poly that this bag is made of is just 'grabby' enough that it doesn't slide easily into a hydration sleeve. For the love of Pete, don't buy this reservoir!