The sleeves were too long and had to be ripped back. The button band didn't sit right and needed reinforcing (which took me at least a year to get around to). I'm sure there were dozens of tiny setbacks, and I'm sure I've learned from them all.
The main thing I've learned that I'm not great when it comes to finishing big things, because that involves carrying a lot of stuff around and concentrating for more than 20 minutes, so isn't great on a train or at knit night. The details are great fun, and do carried me through this project sufficiently that it wasn't just a mountain of stockinette, and I knitted the body up pretty quickly. It was the very end stages where I floundered. Blocking took a while (especially as the sleeves were partly reknitted). Ends were not tucked in for ages. Sewing things is especially bad, as shown by the amount of time it took me to do the button band reinforcing.
At the moment I love it; it's not quite the weather to wear wool to work yet, but I'm sure I will. I also had a fairly useless pale blue skirt and an even more useless pale blue handbag, and I've dyed both navy so I have a complete outfit. Result!
The reinforcing [done using this Knitmore Girls video] has improved things but I'm still not mega-happy with the button band. I suspect that over the last two years I have just gained enough weight that, if I were to start now, I might contemplate a larger size.
But screw it, I'm leaving it as it is - and intend to enjoy wearing it just as soon as I get home!