The favorable reviews have the same reason Telco sales people's windphone7 insistence has.
Microsoft is paying off anybody and everybody who will sell or say something favorable, including first and foremost the Telcos. I know all the sales people in the shops around here got special training and incentives to sell windphone7 over other options.
And you can't seriously believe Microsoft wouldn't use its bankroll to pay people on the internet to get a favorable word out everywhere they can. This will include bloggers, journalists and the usual nameless forum posters that get hired through online ghost-writer portals at 0.2 cents per word. So you can consider a bunch of the posts here coming from MS instructed ghost writers.
If you recognize how badly Microsoft wants to rebuild the position it had in this space, you'll know they are using all the methods I described and then some.
Of course that won't really sway me, since Ballmer left windows mobile customers out to dry for the better part of a decade, just because he figured he had the market sewn up.
Add to that Nokia, who's known for knee fall after knee fall for Telco's interests and going against customer's interests, like sabotaging skype mobile software release for years.
I'm really in no particular mood to support them. Of course I'm not in much of a mood to support Apple or Google either. Do I think Apple and Google are paying for opinion writers too? No...
Apple doesn't need to, there are hordes of logo enlightened sheep that will write about Apple day and night - for free...
Google is too arrogant to even consider it, they wouldn't even if they needed to, I think.
I'll do one thing, I'll avoid the insane thing I saw some people here say they do, which is basically upgrading their phone to some new 'supposedly, hopefully better' phone after only half a year or one year... That's just wasting money on something where the differences are not nearly enough... that's just either extreme boredom, or some strange kind of addiction.
And while you won't find me buying any Windphone7, I will pick up a Windows 8 tablet, just cause I can run Rosetta Stone on it for my kids, and other regular windows applications. And I think its pretty well guaranteed that someone will produce software that removes those silly tiles and makes it look like Windows 7.
First, Microsoft failed for a decade to make small, needed changes, and now, suddenly they caught a bad case of redesigneritis.