I played with the Talisman Pro Hard for 3 years, until I had to replace 2 that blew out within 3 weeks. I went back to triangles until I tried the Tiger's Sniper tips. I love the feel and playability of the sniper tips.
I've used both and highly recommend the PRO MED. It keeps better shape and holds chalk well. The WB tends to flatten from hard shots and gets a little fuzzy when I shape it with sand paper.
I have played with Talisman pro soft for about 7 years now and have never had a problem. I know of quite a few others around here who use them too without problems.