I've bought v1 and I'm quite happy with it as it is. It's just that I've been looking forward to the tweaks that'd been described for the last year and a half, like[0]:
"We threw away almost all of v1.00X, Berkeley Mono v2.000 improves substantially on legibility, fitting, and cohesiveness, especially for bold weights."
If I hadn't heard of v2 I wouldn't be missing it. But I have heard of it, goshdarnit, and now I want to see the new shininess!
I am actually curious about this though, the Berkeley Mono font I found with a search does look quite nice. What's the deal with v2?