1. Their digital bodies are garbage (that's how they're different from Apple). I owned an M9 and between its crappy sensor and faux leather peeling off, I was not impressed at all. The only good thing about that camera was the rangefinder.
2. Their lenses, on the other hand, really have no equal in the industry, and as the very best they rightfully command a steep premium. I had two: 50mm and 35mm Summiluxes. They really put everything else to shame, and they most certainly do offer a superior result. What other f/1.4 lenses do you know of that can be actually used at f/1.4 without significant resolution loss or veiling? OK, nowadays there's Zeiss Otus at 55mm, but it's also not cheap and it's three times the size. Add to that also that Leica lenses are extremely well made and compact, and you'll see why people are willing to part with large quantities of cash to own them.