I've used this phone for the best part of 2 years. I absolutely HATED it when it wasn't rooted, because it was slow, the touch response time was terrible, it had ( and still does have) very little storage for apps and a bunch of other problems. My main problem was that facebook was constantly open in the background, making the phone grind to a halt.
( Note: The camera is also bad as well as the app for it)
However, I must say that after rooting the phone has become exceptional, for the most part. Doesn't get hot often, the battery life gets even better, the response time is faster, it becomes laggy a lot less and I could get rid of any unnecessary app that kept using up all my phone's RAM.
Non-rooted for a power user? 6/10 - Slow, but the battery life is amazing. Rooted power user? 8/10 - Becomes a lot better but can still be lagging sometimes. Non-rooted average user? 5/10 ( with todays standards) - FB Very slow and you can't install too many different apps. Rooted average user? 6/10 - It can get better, but not by much.
Non-rooted power saver? 9/10 - This phone can last a looooooooong time versus phones today. Rooted power saver? 9.5/10 - Nothing is perfect.
Overall: 5.8/10 ( 30th July, 2016)
Aesthetics: 7/10
Response Time: 4/10
Apps: 5/10
Battery: 10/10
Camera: 3/10