Like the Green!
I picked up my Nano a month ago and really like it. I wish it would run the 115gr ammo though! (I have a bunch of 115 laying around from a previous 9mm I own)
I finally was able to get lucky enough to check the website at the right time and pickup a couple 8rd mags from Beretta last week (I checked back later that day and they were sold out again). With the extension, it really feels good in the hand. I haven't been able to get to the range to feel the shooting difference, but I think it'll be a sweet addition!