This will be my first Android phone since owning every iPhone since 2007 except the 5s. My question to those who have experience with Android and Touchwiz in particular, what are your thoughts on it? Every review has mixed feelings about it. (Does your S4 or other Samsung devices lag?) Coming from an iPhone I'm hoping to be able to adapt to the Touchwiz os and that it won't be too much of a shock. I played around with the SG5 in my AT&T store and was blown away with the larger screen and the detail and vibrancy. It seemed smooth...but then again it is a store model and not bogged down with apps, music and videos..etc. Thanks for any input on helping my switch over to the Android world go smoother. Note: I'm doing an upgrade swap with a family member, (giving them my iPhone5) so I'm maintaining my upgrade eligibility. Worst case scenario, if I hate the SG5 and the Touchwiz OS i can wait for the upcoming iPhone 6. But I figured why not give Android a shot.