I purchased the guide when I got my remote (3 weeks ago - I have a RU990) and read and followed it through almost completely - I didn't spot any real problems with it. It's actually an excellent piece of work that did help me understand many concepts quickly and easily - it's a good starting point that will save you heaps of time. It saved me at a least a few hours of trial and error, which is very price-efficient (my pay per hour versus the price of the guide).