The DS vs Magic tracks debate may never be settled. I personally hate the DS material, it's crap. They need to switch over to a different compound more like Tamiya or Asuka uses. I've picked up several Asuka shermans and I love the track material.
I tend to agree that live track would be better off being rubber band style and not individual links. However, when the length ends up being a little to long, then you are left with live tracks that don't hang right. I'm working on an AFV M60A3 right now and finally had to give up on their really nice one piece track. Switched over to their indy link set and it's a perfect fit. But, that set isn't perfect since the guide horns aren't workable. And it's rare occurrence when indy live tracks actually fit right!
PSA: If anyone would like to trade their magic tracks for DS tracks, shoot me a PM!