I really don't understand what all the discussion is about. They don't fix anything and they make tire balancing harder. What is there to discuss?
When I get tires put on they balance them and I ride, no more balancing till my next set. Whether I ride motocross, do wheelies, or jumps the grand canyon the wheels are always balanced. You can run the argument of "what if you throw a weight?". I carry a few stick on weights in my bag for that very reason. If one flies I stick another in it's place, done. It's never happened to me...ever.
With the beeds your always in a perpetual state of balance and unbalance. Every time you stop your wheels lose balance. Every time you hit a significant bump you lose balance. If you change tires you have to mess with beed swapping. If you let air out of your tire you can get beeds stuck in your stem.
All for what? a tire thats only balanced when your cruising and requires more work.
These are good for semi trucks and large vehicles that are a pita PITA to balance.