Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Perfect

Love this bag. It's large enough for anything I need to carry, bigger than I expected even. It fits perfectly with my Topeak rack. When you attach it correctly after sliding and clicking into place and then using all the velcro fasteners, that bag ain't going anywhere. Great quality and for the price (around $50) you can't beat it. I will be spraying some water repellent on it so it's even better, but if it rains you can always just strap a plastic bag around it. I almost bought a crappy little bag from Walmart for $20(worth about $10)last year and changed my mind. Decided to spend a little more and get a Topeak bag to fit my rack. Glad I waited. My local bike store wanted about $80 bucks for this bag. Amazon you did it again. Highly recommend it.