hi mike,
i was using qlab last week and while still more awkward and frustrating to use than scs it does have a neat feature where you can load up to a point in a cue.
for example if you have a whole bunch of fade cues that autostart a set time after the beginning of a cue you could load up to a point in the cue where these fades had completed. the control of this load point was a horizontal slider.
another thing i liked with qlab was an option to not load cues automatically when the cue was selected (you would have to press 'l' to actually load the cue) which was handy for jumping around the cue list quickly without having to wait for the cue to load at each point.
cheers,
t