I rented a DA15 to try this last week, so, of course it rained five of the seven days. I did enjoy my time with it though, especially one day when I was able to take it on a short stroll -- the lens seemed to really make sense at this point.
For interior shots, I wasn't as excited, but if you pump the ISO, add a little grain and turn it to black and white it can give you the feel of old film wide angles, which was appealing to me as well.
Also, for some reason, I was addicted to taking photos of flowers with this lens. I have no idea why.
My humble contribution this monster thread: