Dave,
Good on you. The novelty of not having to climb ladders will initially outweigh the 'pain in the ass' factor of learning a new routine.
After a week or so, you'll be wanting to go back to ladders but stick with it.
First cleans become a real pain to do properly. Really scrub the frames; if you have any problems, it's the frames usually.
Scrub the frames, wet the glass (to soften the dirt), then return after doing all the easy to get too windows and just do the glass; just so gravity has enough time to pull the dirty water from the frames.
Then rinse well. Jeff Brimble compares it with cleaning a car. It's no good just rinsing if you haven't scrubbed the dirt loose first.
I always rinse twice; firstly by dragging the brush lightly down the window; then finally by removing the brush from the window and zig-zag downwards.
For the second rinse, if it's hydrophillic glass, where it just 'beads', I keep the bristles lightly on the glass, and zig-zag.
Sometimes I rinse three or four times. It depends on how fussy the customer is.
But I always scrub the windows and frames well first. Remember Jeff's 'car washing' analogy.
The subsequent cleans then become a doddle, if you've cleaned them properly the first time round.
That's when you start making a return on your investment.