it’s 100% free. I believe you need to download their installer, where all the VSTs are, NI Manager, and just download everything to get started. The whole bundle is a lot of money, but actually 10000% worth it as you get so much of great plugs it’s impossible to check out everything they’ve made. I think if you combine all the plugs separated (price) they are like 10k+€ or so. I believe there is no better way to start making serious music.
I agree, Native Instruments have got a lot of complaints lately, and perhaps their support is as bad as some people say. But the value of the Komplete bundle is still amazing imho.