I actually switched to iOS for the past few months as part of an experiment. I have mixed feelings about it.

I think it's greatest advantage and disadvantage is that it's a sterile environment. No third parties can mess with it. Unfortunately at times those third parties include me, the user.

Overall, I miss my Windows tablet for web browsing which is what I do mostly on my iPad. However, I am waiting for the next round of Windows tablets to see if I can find a 10 inch that is worth my money. I also miss having a (Android) back button on my phone.