One of my main views on C4 vs DIY is the stability of the solution and definitely its coding power. I have been assisting in installing the new Legrand range and something as simple as a arrive or leave button has to be a dedicated button that you stick on the wall. So by the time you have lights, blinds, function keys etc there is no longer an option for minimalist looks. A solution thsts rock solid and easily transferred between dealers also is a big high point. How do you sell a fully automated home thats on DIY? I highly doubt they would want to buy in to a one of. I sold a house fully C4 and the new owner was not tech savvy at all. Took 2 weeks and they couldnt live without it. With C4 your home will live with you. Make tasks simple. Anything you do must be to improve ones lifestyle not add difficulties. My wife questioned why i wanted automated curtain tracks. After a month she couldn't live without it and now its a simple double click of a light switch to open/close, turn on a bathroom extractor. The list goes on and on. And I know in 10 years C4 will still support their systems. DIY solutions come and go but my home will do 100 years or more.