Carol, I'm with you in spirit, but obviously I have succumbed to the ecosystem for now. It's not as bad as I expected. I'm predominantly a Windows user, so having my phone be a part of the ecosystem wasn't much of a problem at all. Now, with Apple, I had issues because none of my workflow was part of the Apple ecosystem, so it wasn't that convenient for me, just more work basically.
As far as bandwidth, the phone has options for certain things so you won't waste bandwidth. Like you can set it to not download high res pictures, and it will warn you if you are about to stream a video. So i think the bandwidth is fine.
Also, there aren't that many apps and features yet, so there isn't all that much happening with the cloud currently for me. The main thing I've noticed as far as the MS ecosystem is that it ties all the contacts on the phone together automatically: facebook, google, hotmail/skydrive. And I may be wrong, but the MS ecosystem seems to be better for a professional workflow than Apple's is.
I let my coworker play with the phone today, and he has the Samsung Galaxy S3 (top of the line Android phone currently). He felt that the Lumia 920 was better made than the Samsung, it's just about the same quality as the previous iphones I'd say. he also liked and noticed how much better the touch response is (also, IMO, as good or better than iphone). Android is the worst for touch response, I'm quite certain of that. So in other words, he was very impressed with the phone.
It's just a question of apps right now. If a decent app selection was available, I think the Windows Phone has iphone and android beat. Now my little sister did NOT like the windows phone, but she is also not a computer person at all, and doesn't need many features at all (in other words, the ideal apple customer).