With my MBP retired as a back-up, I, too, went the refurb route. Oddly, portability, a prime reason I went for the Air hasn't come into play yet, at least until I have some kind of appropriate sleeve to transport it in. (It is a delight to take from room to room, though)
What I've been loving over the last couple of weeks is the power of it: it's fast, powerful, I don't have to keep as much of an eye on what applications I have open (though as I've written elsewhere, Chrome is often a disaster).
I bought this to last for a number of years, and I can see that it will suit my needs for a long time. Do I wish it had Retina? Sure. But not at the expense of battery life or other aspects of the machine...including the ports. Yup. I'm not ready to give multiple ports up, especially as I still have a wired life.
Ask me again in six months; maybe the honeymoon will be over. But all the research (and comments here, pro and con) paid off. This is the right machine for me, right now.