I think DukasCopy has been on the rise for several years now, in a good way. You've got four trading platforms to select from, or should I say, four flavors with only one (MT4) being a real distinction with a difference. If you like Java based platforms, then you will luv DC. I you like paying commissions, then you will also luv DC, but in fairness, I've done some preliminary calculations from a long-term trading standpoint and the commissions are negligible as far as I am concerned - though they might not be to the liking of others. To off set some of this, the spreads are seemingly low (at least as advertised), but of course, that is made up by charging the commission.
They are a Broker trying to become an "FX Bank" whatever that means in full detail, but they seem to have some coherence in their offering. They are a non-U.S., non-Russian, FX intermediary, which is starting to make more and more sense each day given the "talk" over at the CFTC about 10:1 (a non-starter if you ask me). And, you won't have to walk far to gain some of the privacy people look for when utilizing a Swiss Bank account, as this is a Swiss Broker.
I can't say anything else about them as I have not yet made the Atlantic crossing to visit them (I might do so while taking care of some other business), but from what I've seen thus far, at least a second look might be warranted, though I prefer to trade through a real bank, personally - if I can find one not in bed with FXCM (sorry, I had to get that comment in there).
My major concern with the DukasCopy platform would be the longer-term issues with Java based latency inherent in many real-time JRE based applications (I have yet to run a demo on my machine to confirm - maybe somebody else can post about the latency issues, if they exist at all).
I've used the Saxo platform before (demo) and actually had a Love/Hate relationship with its features and functionality. It is robust, no doubt, but often times the trader pays a price for that higher level of functionality. However, I do prefer the more complete trading platform to use, though there were some common sense trade set-up and configuration capacity missing from the Saxo platform, which surprised me given its robustness.