Anyone ever use something like Flowbee to cut yourself? Great results?

I am asking around here, and every salon is asking 200 to do a cut-in. Flowbee is around 100, and I can use it for a long time.

Looking to hear from people who use this system or something similar.

A few vids here http://www.youtube.com/results?search_qu....3.2.3l9l0