Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Self-cleaning and auto-charging are nice features!

The best feature is self-cleaning. Auto-charging is nice, but not essential. Unfortunately, it doesn't get those whiskers that lie flat, any better than my old Braun electric razor. And today I saw that Braun has a new, revolutionary "Sonic" razor. Oh well... ;^)If this razor were stolen tomorrow, would I buy it again? Probably. Would I look at Panasonic's new razor, perhaps a bit closer? I think so.