Well either my Xperia was defective or I'm imagining things but for a device which is considered the most powerful phone in the industry right now it really disappointed me. There was always lag of some sort somewhere. The menus, especially the scrolling and zooming on Chrome is dreadful and no where near as creamy as windows phone. Maybe the GS4 or HTC One are better but it just shows that there is no consistency throughout android. Despite the lag or no lag, the OS is just too fussy, too busy, fonts are too small, everything requires 2 or 3 more steps than windows phone. Windows phone menus, fonts, text, animations throughout the entire phone are consistent to each other, they all match. That is not the case with android though.