I don't know why there complaints about the marketplace. The WP7 platform has been a huge hit with developers; just take a look at what's out on the marketplace: http://www.windowsphone.com/en-US/apps. From everything I know the review process is leagues better than the Apple's in that you get actual feedback about the issues whether or not your app is acceptable. Microsoft has put out a podcast from Redmond that covers what is going on with the platform to help developers http://wpradio.podcast.windowsphone7.com/rss.
"I don't know why there complaints about the marketplace."
Er, because there are 10 times the apps in their competitors' marketplaces. Yes, wp7 has the low hanging fruit covered but there are many apps that cater to niches that are not present. It's like Excel vs OO Calc. Yes, Calc can do most of what Excel can do but it is the remaining few percent of functionality that makes a non-solution for people. And it is a different subset for different people. Just like with wp7 vs Android and iOS. What is so hard to understand here?
Er, because there are 10 times the apps in their competitors' marketplaces. Yes, wp7 has the low hanging fruit covered but there are many apps that cater to niches that are not present. It's like Excel vs OO Calc. Yes, Calc can do most of what Excel can do but it is the remaining few percent of functionality that makes a non-solution for people. And it is a different subset for different people. Just like with wp7 vs Android and iOS. What is so hard to understand here?