I've been using IPs exclusively for several months, so I decided just a bit of experimentation was in order. First I tried the Topaz blades I found in a local Indian grocery. It gave me a comfortable, though not particularly close shave. Then I tried some Sharps, and those work pretty well for me. Then I tried a Feather, although I've used them on occasion in the past. As I was shaving with the Feather I thought I was getting a great shave. When I was done, I looked like I lost a fight! So I went back to the Topaz. This time it just tugged and pulled and gave me the most uncomfortable shave I can remember. So I'm back to my IPs. Can anything unseat them?