I don't have a full head of hair. I have the horseshoe pattern a very big horseshoe, and I have thinning in the back top part of my head. It took me a good two weeks to get a system down that didn't take me a 15min to shave my head. I can now usually do it in about 5. I use gillette Sensor 3 blades I find them better than the hb triple blade because they have more space between the blades, easier to clean. I would rather buy HB blades because I would rather support them than Gillette. I get 2 to three shave out of my blades. I probably could get more but I have OCD when it comes to my head.