I was one of the first ones to buy this phone when it was launched, so had to pay higher prices as compared to its current market price.
I shifted from Blackberry and found WP 8 refreshing. Being a heavy email user, I wanted something which can at least match the email provided by BB (which is the best). This phone comes very closer to it.
Its a well known fact that Windows phone lacks apps but lets face it - how many apps do we really use? Few games, FB, Twitter, Linked-In and Whatsap ... thats it. This phone runs all these apps properly.
One of the reasons to prefer Lumia over Android phones is that, Nokia offers a very good call quality and battery life. I think, this is what we use phone for. Lumia 620 excels in this department.
Camera quality is acceptable. This phone comes free with Nokia music service which is an amazing utility. I downloaded almost 10GB of songs in a month.
So, here is a verdict. If you want a good phone and dont really care about apps, go for Lumia otherwise Android is fine.