Big plus from me, but you knew that already, so I won't repeat myself, except to say I think they make economic sense, but even if they didn't I'd buy them for the improved wet weather braking. I now have three, after 8 months on a front 26" I didn't consider anything else when I needed a pair of 700c wheels. Eventually all my bikes except the fair weather road bike will have these.
Just to question your comment on brake pad costs - the recommended Swisstops are £15 a set (2 pairs) I normally pay around £5 a pair for standard pads or £7 a pair for Koolstops. So there's not a huge difference unless you use really cheap pads and I've never found any of those I like. The Swisstops also seem to be lasting well, though it’s hard to be sure as I’ve never recorded how often I’d normally change pads.