I use the sport with HB3 blades. I also have a Gillette Power Fusion with the blades that come with it for the trim.Here's how I do the blade math. If I used just the Sport, I'd go though one blade per week. If I used just the Gillette, I'd use one blade per week. If I use BOTH, the blades last two weeks. Net cost? The same. No increase in cost to use two razors. The only minor inconvenience is stocking two types of blades. I can live with that.
I use just the Sport with the HB3 cartridge and HeadSlick.I go full strokes from front to back and then reverse it on my finger and go back to front.I then hold it by the side and then do around the ears by shaving upwards. I then, holding it the same way, do two small spots on the back of my neck on each side going upwards on a diagonal.
Here's my suggestion:Use a DE (double edge) Safety Razor! The blades are cheaper and the shave is a true BBS shave!
I don't know if - or what - I am doing wrong, but I do not get a terribly close shave with the Sport (or the ATX).I have read a number of guys on here that love and it works for them, I like the idea and design of it, but for some reason I get left with lots of stubble all over. I even tried Tyler's suggestions of long slow strokes from the front to the back and then reversing that.I usually end up cleaning up with a Fusion Power, which I get great shaves with! The ear area is the hardest area to 'detail' for me, as it seems to be for others.