I love this phone. My family is jealous when we are outside and I can read my screen easily as they struggle to read on their S3.
Over time my battery doesn't keep up as well as it used to, but all phones have that issue after a lot of charge cycles. I'm a heavy user so my phone gets charged a lot. But so did my S3 when I had one.
I work in the basement of a 65 year old building. The WiFi signal isn't that great down there, but it connects better then my S3 and my old Motorola Atrix.