Self defence doesn't really take years to learn, however, often people map out that it does due to the number of techniques you have to learn and all the variables. If you ever look at anyone who is really good, they rely on a very small skill set. Stuff that actually works the rest of the material is there to enhance your journey and to keep you training and enjoying the stuff. I like to teach the basics, the fundamentals, the elements if you like. I want to make people good quickly and not feel I have to shower them with hundreds of techniques to keep them there. If they like the gym then I hope they keep training. In the end I want everyone to better themselves and often this transcends merely the self defence side. So if you hear someone saying that's not really Krav Maga it looks more like boxing, or it looks like Kali ask them what real Krav Maga is.