Is it fast? I have a 6. In addition to the bulkier size, apps are often slow and the battery life is atrocious. I'm considering updating when the new iPhone releases in the fall.
I usually do a backup, wipe, and restore every couple of months which temporarily resolves the issues. I'll definitely go to an Apple store soon. Checking Instagram and Snapchat (No Facebook) every few hours, playing music, and using 30-60 minutes of Google maps each day will kill the battery in about 4-8 hours. It has gotten to a point where when I go to an event, I'll make sure to turn off my phone to save enough battery life so I can use maps later.
I just went from a 5 to a SE and the SE handles the newer OSes much better. It's too bad, because if it wasn't for performance-hog-OSes the 5 would have been great for years to come (though after a battery swap)