With my crew cut, it would pay for itself in 4 months not including the time wasted waiting in the barber shop.

Though going shorter would be nice for me. It's currently growing back to see how well trained it is, it seems to know "STAY" but no longer seems colourfast. lol.
Make it water proof and it'd be absolute gold! Forget the cape, just run it quickly over your head while in the shower, you'd get a trim every day.... or so ;)

There is no way the convenience of a cordless design is worth the expense of the rechargeable battery.

Wow! That's original...
(Google "Babyliss Easy Cut").

Another one, going strong since 1988. http://en.wikipedia.org/wiki/Flowbee I'd want to look at several youtube videos by users of any of these devices. They may work great for some people, technique can be kind of important. If you have a dog that needs reqular grooming, one of these might be good. Some dogs totaly freak around vacuum cleaners, so that should be checked before buying one that involves that.

I've managed to cut my own hair with clippers for 20 years now. $25 a set of clippers, they last a few years.

I was just about to say the same thing Keith Reeder, This device has been around for years, I owned one but gave it away as it was almost impossible to achieve the 'same length cut' as advertised, the reason being the motion required to use the cutter is that of a rotary one, meaning you can spend 20 minutes running the device around your head and still have patches everywhere that it didn't cut... No good..

I am a retired person with well receded hair line. So it is just like fringe with shining top.
I haven't been to a barber 12 years. My standard Panasonic hair trimmer with variable hair length does very well. It cost me only 60 UAE Dirhams. Say around US$ 15/=
BTW anyone who wants to trim wet hair, DON'T. Without exception all trimmers work only on dry hair. Only trimming device that requires and works on wet hair is a Swiss made comb incorporating a special type of double edged safety razor blade that I used in the 70s in US.

Yes Keith, quite correct, but the Babyliss is rubbish, I have one.

Tried it a couple of years back after using NiCd Babylis clippers for 5 years or so. Battery finally gave up. Tried this useless gizmo - hopeless. Then found the Lithium Ion 'Wahl Trimmer' which uses re-chargable batts. It is fantastic. It looks really wimpy when you see it in the flesh but it is very powerful and the charge lasts for ages - and unlike NiCd cells, Li ones do not go flat if you don't use it for a month. Brilliant!