Mark:
I have suffix braid on all of my rods/reels. Ten pound on the spinners, and 20 pound on the casting reels...........I love it! Have not had any problems whatsoever. Sorry to hear that you have had some problems. Maybe perhaps you did get a bad spool. You are correct about the notch in the spool...............dumb idea.
Now, when it comes to Cortland Masterbraid. I tried it on my casting gear and absolutely hated it! It would backlash very easily and when it did backlash, I had the line snap twice costing me two baits. I hated the color of the line even when it was new. I would challenge anyone to compre cortland and Sufix braid and get back to me on what you honestly think. Ken D., can you honestly say you have tried Sufix for any length of time?