Has anyone used these screws? They look like they would be really clunky when racked.

I own a half of dozen of these. I have to say they are fantastic. Much better than the BD's. Can't compare to the Petzl's though. Just today I placed them in ice when it was -27 degrees and all but one bit the ice like a shark. I love the independent hanger with the dogbone. Allows you to clip in when you are only half way screwed in. Adds a little extra sense of security. I haven't noticed any rust yet. I would say they are worth every penny. They should last many years, and can you really put a price on your life? If there is one drawback, it is the large handle. While it makes it super easy to place the screw, it requires a little work to clear the ice around the placement to not get caught up (especially in a concave area). Pro-lite gear has a video of them getting placed.

I can't say that I used them yet although I'm buying a couple to add to my rack. I was talking with Bob Culp who is a long time ice/rock climber/instuctor in Boulder. He loves them and after asking the same question you are he said they are not a problem when racked.