I've had the same LG Optimus F6 for over two years and have been very pleased!
Great battery life, 4gLTE in 90% of Central Dallas, all in all a great phone for daily use.
Only complaint I have is limited onboard memory. Sure I've got a 2gb SD card but when it comes to installing big apps, its gotta through the onboard first etc.
My next phone will most certainly be another LG.