Over the years I have tried a lot of blades and figured out that for my beard (72 year old beard and first guy in my class to start shaving) and shaving objectives (three passes, zero discomfort or unpleasantness, and typically a BBS 10) I like a mild razor with a fairly sharp blade. I also like a blade that will easily go two weeks and can go a month, thereby eliminating some of the more exotic super sharps. I had already narrowed it to PIR, Astra SP, GSB, Nacet, and Crystal. I was getting low on some (most) of them and needed to accelerate my winnowing. Using a blade for three weeks and another blade for three weeks makes good comparisons challenging. So I have squelched the Scot in me and have been doing 2-3 use runs and A/B comparisons. Current rankings are PIR and Astra tied for last, Nacet a very close number 2, and GSB and Crystal tied for the number one slot. It is possible to rank the PIR (but not the Astra) higher if I use a slightly more aggressive plate (ATT copper regular rather than the usual copper mild), but the bottom line for the Astra and the PIR on my cheeks is that they are not as efficient as the other three. I plan to repeat this process a few times to avoid disqualifying or proclaiming the winner when a fluke may be involved. Everything else remains the same: Hot water for a pre, a Kent BK4, MdC Agrumes, a shower, and 4711 cologne for after. Above the Tie Windsor with CM1 and Kronos handle holds each contestant.