Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Braun Replacement Pulsonic Head Series 9000

I used to own the older style Braun Foil shaver similar to the 360 series that is reviewed in Consumer Reports and is top rated. I got moved into this product through the slick advertising by Braun that appeals to techies like me, thinking that anything that vibrates at supersonic speed must be better. Wrong! The older style foil head gives a faster, closer shave and is much preferred by me. Now I have a Pulsonic shaver with two heads that I don't really find very satisfying. Replacing this 9000 series head every 18 months, per Braun's recommendation, is not cost effective for the user. It doesn't cut any closer than the old one.Considering a Braun shaver? Try the older style 360 series.