Review (5/5): Excellent battery life, durability, lifetime warranty, and customer support
I purchased the PG6855 for my husband almost two years ago. He loves the rubberized grip (great for when you accidentally drop the clippers in the sink) and the great battery life (which is so long that even I noticed how infrequently he has to charge it). My husband also notes that this device "stays cleaner" than others--hair doesn't seem to build up in cracks quite as easily. Unfortunately, the product spontaneously stopped working after a couple years, but I contacted customer service and they replaced it within a week--no hassle, no wasteful shipping back-and-forth. If you're tired of buying new, cheap clippers all the time, I would highly recommend this device.
Someone else posted a review saying the guards were hard to change--this person must be doing it wrong. I went to the bathroom and tried a couple out just now. I've never used an electric trimmer in my life (I prefer wax, thanks), and I had no trouble changing guards.