Without much difficulty I since have reached 5 kyu and I have the profile badge to prove it ;)
Up to this point, I haven’t needed to think too deeply to solve the kata. It looks like 5 kyu onwards is when things start getting serious. My usual approach has been to read the brief and dive in to implement a step-by-step solution based on the brief, but that doesn’t quite work so well anymore. Now I’m going to have to really think about the problem!