I won't beat around the bush, while ymmv the Personna Meds and the Iridium Super blades blow everything else away in my opinion. Put in a 7 O'clock black today after hearing a lot of good about it. Didn't like it at all. The yellow is better in my opinion. No blades offer the sharpness, smoothness and forgiveness of the Med and the Super. Feather may be slightly and I mean slightly sharper, overall especially after the first shave it pales in comparison. Unfortunately I understand the Iridium Super is no more. I have some Polsilver on the way to see how they compare to the Iridium. If they are identical I can see adding them. If not I will make my first 100 blade purchase of Meds. More expensive than many but well worth it to me. I have heard to just get the labs as they are pretty much the same for half the price. I will give them a try, but I doubt Personna decided to sell the same blade for half the price, there has to be a difference. In any case the Med and the Iridium are top of the mark to me.