Thanks to Sergio and Ironhamer for this PIF from down Mexico way.I tested all three blades that were sent to me. As I mentioned in the PIF thread for these blades, they passed the "three shave test", meaning that I got good three accepable (actually, very good!) shaves from the first blade I tested in my HD. I'm conservative with how many shaves I try to get out of a blade, but I used the first two blades for four shaves and got five very nice shaves out of the third blade. In the HD, the shaves were a bit too close for every day use. I then tried the 1904 closed comb and found that I had to do a bit too much work to acheive a good result.The best shaves for me were in the DE87, which yielded shaves almost as close as the HD, but with no irritation at all. Apparently the price is 20 pesos for a pack of five blades, which is about US$2. That puts the per blade price at 40 cents US - a bit on the expensive side for me, but if you can get four or more shaves out of these blades, it might be worth it to buy some.