What I use depends on what sort of flying I'm doing. For a local bimble, I'll draw a line on the chart, maybe, and measure it, and that's about it. For something a bit longer, in light winds, I'll draw the line and do an approximate estimate of drift for the wind. If crossing France, with few ground features, I'll still draw my line, but I'll use VORs and GPS. But for a long trip in the UK, I'll use my whizzwheel. Why not? Once you're really in practise, it's as quick or quicker to use this than any of the approximations. It only seems complicated at the beginning. When you're used to it, it's fast, accurate, easy to carry around, doesn't need batteries, and doesn't go wrong. Those who disagree probably never learned to be that comfortable with it in the first place.