I just updated my iP4 to iOS7, it does look kinda similar to Metro with regards to fonts and the clean look. Overall I do like it compared to the old style. It doesn't feel any slower or less smooth. That said I do like the new compass app and the quick menu to turn on/off WiFi, BT, airplane mode etc. I've only used it for a few minutes but so far it's a nice improvement. I'm also glad it's compatible with iP4 even though I'll be upgrading to iP5S soon...at least I can use it as a dedicated non-phone device.