Oh my god! I hated and Loved this phone. It was a great snapper and a decent video camera. But that damned plastic body was aweful! The battery was too down on power that it wouldn't last a day full. That SOC is also a pain in the ass. While only 200mhz more than the OG Xperia S, It was a battery hogger. I had to replace the battery 4 times! Each time the battery was near 90 or 80% of its lifecycle it would turn off at any battery level, I had to root and downclock the CPU to tackle with this issue. But the features were soo damn good! I could not get rid of it. The rooting experience was also bad! Being a neglected child, It was low on support from the devs in terms of custom rom support.
That's kinda true... But in my experience, the battery life was pretty good. And as for the Custom ROM support, the latest available ROM for it is Android 8.1 Oreo, which is pretty good considering the age of this phone, and rooting it wasn't exactly bad as well...