So true! I'm doing body weight strength training and I'm amazed about the results. What is important is to annotate everything on a spreadsheet, in order to gauge progress, understand the concept of progression, and build a program that covers the whole body. But, don't obsess about the program, two years ago, when I started, my program was bad, and I have been improving it gradually, as I have been learning things. Due to work constrains I can't have a fixed plan (the same every Monday, Wednesday, ...) so I have to adapt constantly, which is great, as the results have been good. Bodyweight training adapts well to your life (not the other way around) and you can even workout in a hotel room!