Leica images aren't really all THAT much better, but as tools the cameras are amazingly lovely to handle. :)
Ok, it's been too long since I've used this lens. I just mounted my Summitar to my M2 to take on a family hike today. Going shoot the last few rolls of bulk-loaded APX400 I have left.
By the way, no connection to the seller but if you're looking to mount more common hoods to your Summitar these work great: