I have a chrome V1 "Big Bertha", and I really like it, quite a bit. I had the black version, twenty-five years ago, and sold it off. Really regretted that decision. This chrome one I got from the RFF classifieds for $200, and I'll never sell it. Also I have the chrome Visoflex mount for this lens, and two OUEPO extension tubes, which get me quite close. And a full set of the E48 Leitz filters. As everybody says, it's heavy, but so is all my other stuff from the same period. Great on my M2 and M5.
I alternate between the 90mm Summicron, my 85mm F1.5 Canon, and the 90mm F4 Collapsible Elmar. Good to have a choice, especially when I need the extra speed.