I also endorse the vacuum cooling system tool. I converted last year and will never go back to the old-fashioned gymnastics necessary to remove air.
on a similar note, I am a veteran convert to a pressure bleeder tool, I find the one by Motive to be just fine. It takes longer to lay out the towels and prepare the pressure bleeder then it does to bleed a clutch line. Doing the brakes is equally quickly accomplished.
Larry