Wow. Thanks for this. I mentioned I want to get up-to-speed before making such a purchase* and this will tie in with my (actual) birthday in the summer. I feel this purchase is meant to be.
* I figure I will look a bit of a plum wearing such shoes whilst a few pounds over weight and blowing like a horse when grinding around the neighbourhood.
Because I don't race I've never really considered buying a pair because, given their supposed limited longevity, I'm not sure I could justify the price, even with that 25% off.
I think the Zoom Fly 3 was considered the training version of the Vaporfly and I do have a pair of these which were my "fast shoes" before I bought the Tempos and I've really enjoyed them. Mine are approaching 450 miles now and I've worn through the (thin) rubber on the outside heel of both shoes due to how I strike. I'd certainly get another pair and at £140 RRP (shop around or use the birthday discount!) they feel like good value for money to me.