"My opinion on "Softies" -- they work. They protect the stem. They are like why to use condoms -- there's good reasons to use them, but they do take some of the enjoyment out of it."
+1 Roth.
Not being a voracious clencher, I've never had to resort to these, but this thread just gave me a good idea. There were a few estate pipes on Ebay I was really interested in, but passed them up because of the horrid condition of the bits. Although I could have arranged a stem/bit replacement, this would have detracted from the originality of the pipes. Covering the damaged bit with a Softie would be, I think, an excellent compromise.