I just built up my Melee in blue and it is an amazing bike. I came from a 7 year old carbon climbing bike. Compared to that, this this is noticeably faster, more compliant and more responsive. I'm not sure how all those those things can coexist but somehow they do. It soaks up WAY MORE road chatter than my previous bike with same wheels/tires. It definitely cuts through the air better because on my first descent on a road I know, I over cooked a few corners because I'm used to what speeds I know. And while climbing and sprinting it is VERY responsive. And I love the minimal design. I'm not a fan of loud bikes that scream brands.
If I had to identify any downsides I will say that I'm disappointed with final weigh-in. I'm running at 56 with dura-ace and some decently light wheels. For a bike of this calibre, I was hoping for less than 17 lbs. But that's okay.