I have myself, wife and kids all on windows phones. I'm using a 1520, wife uses 830 (but just bought a icon on ebay this morn), kids using 920. I love the family safety feature that MS has. They can't go on google and look bad crap up. Also don't struggle with the app gap because the main apps are present and made well enough...Facebook, Messenger, Intragram, Maps, Groove, Onedrive, Onenote and so on.
I too think it's the easier of the 3 systems to use. I love live tiles that are showing me my emails, love that. I realize they're all similar but I have less issues with MS than I have with Apple or Google. For example, my first android phone could not d/l google play apps because I already had a Lenovo A1 tablet on that account. I could never remove the Lenovo A1 so I went back to the store and they told me, make a new account. I told them shove it! REFUND! Then I tried WP 8 and found I could have lots of devices using the account with no fuss. With Apple, I have an Ipad and it constantly wants me to put in my password. I'm thinking it's because I used a Hotmail address. I see no reason why iOS should need to verify that every 5 minutes. We hardly use it so I don't care. But yea, I found the family safety feature and have never looked back since.