I just leave a bit of beer behind in the fermenter, swirl up the yeast, trub, and beer and pour it all into a sanitized container.
This technique is used by every truly experienced brewer that I know.
I think that at least for me it's a combination of laziness and effectiveness. It's the easiest thing to do and it works as well as anything else I've tried.
If it's simpler and produces good results...then it's a viable process in my book. I've made dozens of beers using this technique with very good results.