But from the web site explaining what you'll get in his book, all of the points there were not rocket science.

Also fascinating to chat with travellers from different parts of U.S., Canada, Brazil, Mexico, Ecuador, France to name a few.

@Genny LiGreat question.I know the science, seen the videos, but still have not done this.My properties have lower ceilings at the water heater, even though they do have segmented rod replacement options.With the cost of water heaters, it may well be time for me to think of such things....

It's not rocket science maynge.

I happily laid my neck on that chopping block by giving market forecasts (some may call this predictions, but a prediction is a guess, I do forecasts which are rooted in the SCIENCE of math and data to project out future-casts). 

Don't reinvent the wheel, just follow proven building science and you won't go wrong.http://www.tcnatile.com/handbook-all/910-2014-tcna-handbook-for-ceramic-glass-and-stone-tile-installation.html

Is there any science involved or is it all plugged into a computer and it spits out the appraisal?

Not sure if you've run a marathon, but what I've found (and what the science tells us) is that the further you go over a marathon, the less like a marathon it becomes - mostly because the predictive value of VO2 Max breaks down and there hasn't been a good alternative developed to predict times. 

I find this fascinating.

Like you, my fascination is in mini storage's but unfortunately they are highly capital intensive but can pay nice dividends with low maintenance.