Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lacks battery longetivity and blades don't penetrate dogs thicker fur

I purchased this unit through a dog catalog. I loved the idea of having the option of both cordless or corded, but mainly wanted the freedom for cordless trimming, so I could make the mess outdoors. The trimmer fits nicely in the hand. Although I am able to trim my Affenpinscher's face and ear area to some extent, it doesn't quite get through some of her thick fur. I also attempted to trim my Norfolk Terrier's coat as well, but it wound up VERY uneven. I wound up resorting to scissors, which defeats the purpose of why I bought the trimmer in the first place.If you want a trimmer that basically is for a quick touch-up, this would be for you. The battery died quickly on me. I would say I didn't get more than 15 minutes of trimming time. I guess I'll have to revert back to my old corded trimmer.I highly recommend the Oster name. The brand has always been a reliable one.