Long time lurker, first time DE user here. It is apparently THAT good.
The main reason I switched from Mach3s were financial, I shave my head almost everyday and my beard few times a week, I'm 24, so 30 euros per 10 blade packs seemed unnecessary. Today I tried a double edged razor for the first time, got a Mühle R89, Proraso shaving soap and a Barbury's brush.
It was truly the smoothest, most enjoyable shave I've ever had. I only went for the beard this time, had to do a lot of passes both with the grain and against the grain but almost none felt irritating. I'm not sure if I was happy with the brush or not, it did leave some strands here and there. In the end I managed with only a few nicks (?) around the adam's apple, though they were not cuts but looked like the razor tugged the hairs? I'm not sure. I'm just very pleasantly surprised, and I'd love some tips for a newcomer!