Sully, the two biggest issues with the DRS are (a very small) number of howlers by the 3rd umpire and poor use of it by the teams. It was interesting to see England, who had been very astute up to now, blow both of their reviews on poor decisions last night when under pressure.
Referring 50:50 decisions is biased against you. The 3rd ump will give benefit of the doubt to the on field ump, unless there is a clear howler. This turns the 50:50 odds into something like 20:80 against you. As for Snicko and hotspot, I think the use is pretty much right now. Too much risk of Snikco being manipulated.
As for Aus, we are somewhat liberated now and can start preparing for the home series by selecting and playing well in the last two over there. I have defended Watson up to now, but its time for others to be picked.