And I live in California! 
I'm so glad you like the dress! if the fit works for you, it's the kind of thing you'll pull out and wear once or twice a year for ages - it'll cover you for the odd occasion you do need to be formal. I don't think it'll date much, and the way you style it is easily changed. (Right now, I'd wear it with some bright pointy flats).
Boden usually has a code floating round for 15 or 20% off with free delivery and returns, so you can order a few sizes to try without being left out of pocket.
Oh yes here you go, apparently M96K is 15% off, free delivery & returns until today (for you), the 24th.