Is updating to ios 7 worth it?

I still have ios 6 on my old iPhone 4s because I like it a lot. I haven't updated because I think that ios 7 is ugly. But lately I have been curious as to what ios 7's unique features are, and I want to know from people who actually have had both ios's.

So, what things are definitely better in the new ios? What things were better in ios 6? Do you think it's worth it to update enough to deal with the ugly layout? I appreaciate everyone's opinons!

A lot of people have been complaining about how bad IOS7 is and how they wished to not have updated. Things like battery drainage or giving our there location without permission has been mentioned. But at the same time some good comes out of it. I would probably update it

  • Will updating my iPhone apps affect my phone speed as how updating the Operating System (OS) will? Currently I'm using the iPhone 5s on iOS 8.3 I know if I were to update my phone to the latest OS I may notice some slowdown on my phone's performance, since it may not have the "muscle" to handle certain functions. Many apps now are optimised for iOS 9 and/or the 6th generation phones. Will my 5s' speed performance slow down if I update my apps? Will the app's performance slow down?
  • Will updating from ios 6.0.1 to ios 6.1.2 remove everything? I know that if you 'Majorly' update your iPhone it will erase everything from your iPhone like updating ios 4 to ios 6, but what if you are just updating your iPhone from ios 6.0.1 to ios 6.1.2 on the same version, is there any difference or it will also remove everything?
  • Updating unlocked iPhone 4 to latest ios without losing carrier? I have an iPhone 4, not 4s, and the current ios is 4.0.2., and the current carrier is T-Mobile. I need too know if updating it will take out the carrier and/or brick my phone.
  • Updating iOS version on iPhone itself? Hi, I was wondering if I updated my iPhone to the latest version, on the iPhone itself; i.e, not going through iTunes, but rather by settings>update, will I lose my photos, contacts! And will I lose my jailbreak!