Yeah, I've made a zillion screw-ups trying to calibrate mine last night.
In the short time that I've used it, I've enjoyed the Analyser Pro a lot. It's really great to be able to get a usable print in one try without making any test strips.
Even when you use it straight out of the box, without calibrating, the thing is still pretty darned accurate. I'd say 90% or better, depending on conditions.
This isn't hard to do. It just takes a couple of practice runs to understand what information the machine is asking you for. Once you do it a couple of times it practically becomes second nature.
I'd say, bottom line, the Anayser Pro teaches you to better visualize your print before you start.
From my short experience with the Analyser Pro, I'd suggest using it straight out of the box for a day or two without worrying about calibration unless you get really wonky results. Then, when you see how the unit works and are more used to operating it, go ahead and calibrate. You don't need to get all wrapped up in calibration right off the bat.
To make a burn-in, you just hold the expose button down until the display says, "diff."
(Sorry, I must have dyxlesia. I always seem to get my mords wixed. )
So, when you make a burn-in, I'm guessing whatever time is on the display before you press and hold "print" gets stored in temporary memory to be used to make the difference calculation. As long as you don't quickly press "print" or press "X" (clear), that number stays in temporary memory and any numbers on the display when you press/hold "print" again are used to make the "diff" calculation.
That's the way it seems to work to me. As I said, I like to understand the way things work instead of just memorizing steps from a manual.