[mks4]

I can't really speak to the longevity (although I've never read any negative comments on the topic), but I enjoy mine. I own the LE SD tuna that came out >1 year ago. I don't wear it often as it is part of the rotation, but when I do, I am glad I have it. It's a unique movement that I like having in my arsenal.

Oh, and as many have stated, you could daydream for long periods staring at that sweep second hand...so smooth!

Good luck!

Mike