I like models. Even if they are just models. For me, time will tell if this book represents a real model or a hypothetical one. Nevertheless, it’s an appealing model that seems to make a lot of sense for a startup. A bit too simplified maybe, but defines most of the startup phases I’ve encountered, seen or heard so far. A note has to be taken that the model presented, J-curve, although linear, might in my view include variations in real life and definitely does not have to be as continuous as presented. Some steps might be longer, some repeated, some skipped. It’s a model, after all, intriguingly fascination that is.