Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Must have for your cordless driver!!!

I love this thing! I bought a second one to throw into my extra cordless drill. The length is good (allows you to get into most places...not much longer than other bits). Swapping out bits is a breeze! Note: it doesn't use the "Power" style bit with the relief to lock it in, but the magnet is sufficient to keep the bits in place (plus it keeps the driver shorter in overall length). The first one I bought has lasted for YEARS of medium duty use. I like the sleeve that covers teh screw, doesn't always work for longer screws (but I have a longer version of this for those rare occasions).