Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best keychain knife

I bought this swiss army knife this past week to go on my keychain. In terms of size and function, I think it's the best deal out there - small length of the classic, with scissors, flathead/philips, screwdrivers, tweezers, bottle opener, pen, and nail file. You can upgrade to the midnite manager with a light, but as I already have a 1AAA light on my keychain which is much brighter, I opted for the regular manager as I won't have to deal with replacing the silly little button cell batteries.I've had other multi-tools and SAKs, and I find for a keychain tool I don't need all the outdoorsy utilities like the awl, the can opener, the saw, the multiple - if you need a heavy duty multi-tool, you might as well go all the way and use a full-size leatherman. For something small enough to fit in with your keys, and to handle everyday home/office tasks, the manager is perfect.Fast shipping with amazon prime, works 100% so far.