Well I just jumped into Windows mobile (Phone + RT) with both feet a couple days ago. I'll be gad to share my impressions, but I hope the hard core fans don't flame me too bad! I use windows 7 at work, and had used BB phone for work and Ipad for personal use. I didn't like IOS, and wanted a consistent experience across platforms. I bought a 928 and 2520 (as I said, I went all in).
The good, the bad, and the ugly...
The good:
Although I was waiting for the 929 (so my phone wouldn't be outdated, and would run new freatures like Cortana next year better), I gave up and bought a Lumia 928. It is awesome! exactly what i was looking for. fast, clean, does the core things I want (phone, browser, camera, Pandora) really well, and I don't want a million apps on my phone (not a knock on the number of MS apps, just a statement of what I'm looking for in a phone).
The Bad: (well not really, but for the sake of the theme)
2520 is mixed. The hardward is great. Screen is amazing and the tablet is very fast. That said, I (perhaps naively) wanted to have "near laptop ability", and I don't think this will get me there. Unlike the phone, I think RT is a little lacking. Some web pages don't load properly, YouTube app isn't great, etc. Again, nothing against Nokia, just not what I'll probably end up with. I'll probably return for more of a true "2 in 1", lika a Sony Vaio or Lenovo product. (although very hard to get GPS and 4G). Also, on the phone (Amber update), some of the Amber features don'e seem to work. MS store couldn't help.
The Ugly:
One thing I hated about IOS was that it was very "controlling". It has a very "we knnow what is best for you" mentality, that I didn't like. This seems to carry over to Microsoft. When I got my phone it asked my for a profile, and since I think it shouldn't matter, I entered a bunch of BS (like the current date as my birth date). It turns out this info is used for everything, and I was unable to purchase apps, or really use my phone properly. After messing with it for a coupel days, I finally drove to a MS store. They said I had to completely wipe the phone. That is really messed up! On top of which, I did something I've never done, and read the MS user policies. They have the right to retain and share all your data (yes, it's in there). That's also really messed up. Mostly likely I'll stick with it, as I know google is just as bad, but I find it ironic given the MS "Scroogled" campaign.
Hopefully I can find a "2 in 1" tablet / laptop (any suggestions?) that will solve some of these issues.