The Feather lite blades IMO are not worth buying three shaves and you may as well bin them, but on the other hand the Pro blades just go on forever I've had as many as 15 20 shaves from one blade, the Pro guard well I've never tried them, but a word of warning regarding the Feather super Pro they should carry a health warning be careful the blade protrudes far to much from the razor and will eventually get and get you badly. I wouldn't buy them.

Jamie