I Updated my iPhone 4S to iOS 8.0 and lived

Question

I read all the reviews that said don't update an iPhone 4S to iOS 8 and I get that there is a performance hit because the 4S is now 3 generations old.  But I also checked out a number of YouTube videos of people running the iOS 8 Betas and finally the GM on 4S's and I couldn't see what the big deal was.
So I spent 45 Minutes updating my phone last night and I am quite happy with the results.  Yes there is a tiny (and I mean barely noticeable) difference in speed of switching between things.  It is not enough to really bother me so I am happy there.
I like being able to respond to a text message without having to stop what I am doing. This alone makes up for the difference in screen speed.
I have tried out as many of my apps as I have had time to since last night and so far only one seems to be broken by the update.  It is Lagu, the music player that is a very close approximation of the iOS 6.X music player that I really loved.  The app runs, it just won't actually play the song I select.  I sent a notice to the developer and I hope that he is able to fix it.
I found this update to be easy and simple.  I always do my iOS updates through iTunes on my PC because from what I have noticed over the last 5 years of owning an iPhone since Apple started offering OTA updates they tend to seem to be the ones that cause the most problems.
I will watch battery life today and see what happens, but so far it seems to be as good or better than I was getting with iOS 7.1.2.  I was one of the lucky ones I guess and I didn't get the battery killing bug that so many people seemed to get hit with.
Wifi seems to be working just fine.
I listen to TuneIn radio on my way into work on the train (90 minute train ride with no wifi) and the show I want to listen to isn't available on a plain old pocket radio (Remember those?) so I have to listen on my phone.  Between the streaming radio and my fiddling with my phone all the way in I burned through about 50% of the battery.  So I will see what happens today when i am at work and not spending so much time digging through settings to see if anything has changed because of the update.
So far I haven't found anything that the update changed or reset to default so the programmers seem to have done a good job with this update.

Answer 1

I couldn't find the edit button on my original post so I am posting an update here.
I have gone through more apps and have had good luck on all but one more.  And it's not that the app doesn't work, I am talking about the Yahoo Weather app, It works fine, but when you swipe between cities the screen lags a bit and it sometimes doesn't move between pages the way it should.  On iOS 7.1.2 it was smooth as butter but on iOS 8.0, not so much.  I will post a note in the app store to let them know.  I really like the Yahoo app better than the new stock app.
I have been going through my games and they all work fine. Angry Birds (Original and Stella), Canabalt, Minecraft, Bejeweled 2, Silly Walks, PopWords, Doodle Jump, Deep Green all seem to work just fine. 
Starbucks app works as it should. 
I will stop back again next week after I have had the weekend to play with it in detail and post my thoughts again.