So I've been using the lumia 920 for the past year. I have my posts on it here in the forums. Overall, it has a couple of nice features but very underwhelming.
So the nexus 5 came out and i got it. If anyone is interested in comparisons, let me know. Here's what I've noticed so far:
Of all the interfaces, I like the Windows one the best with the tiles because they have a lot of interactivity to them. However, hardly any apps take advantage of them in any kind of helpful way. The best is probably facebook with the grid of pictures it shows. But it would be nice to get more useful stuff there. Windows also has the best integration of contacts of all the other phones (ios, android).
But Android as you all know is the one that lets you do the most with the phone, and just they way you want it. Android has widgets which is what tiles do in windows. The widgets are not as smooth as tiles, but there are so many kinds that you'll find something satisfactory. I can also use all sorts of apps, transfer files, root, customize...way more than other phones.
The Nexus phone is fast and light and awesome. The biggest headache so far was spending hours getting all my contacts organized properly with all the services. After that, this thing is a joy. Windows is far too locked down to have fun with it. Iphone is the same, but still much more open than windows.
Anyway, that's the update so far. It's a nice phone, I don't miss the lumia at all. in fact, it's quite liberating. MS needs to get it's ass in gear, cmon. Android is providing the windows experience that we are all used to, and MS has gone completely the other direction in making the most restrictive, over simplified phone operating system on the planet. Geez.