I think you will love it especially if you thought the 520 was a capable device.
Granted it is my first dance into the WP OS but I love everything about the phone minus the power button being the only option to turn it on at the moment. Screen is very good, battery life is ridiculously good (almost 2 full days),and the device flies and is very snappy.
Ya, the 520 was my first WP8 device and it's alright. Like I mentioned, I never use it and haven't tried to use it as a daily driver due to the lack of LTE and my understanding of WP....just not comfortable with it. Its fun to play with and I tell myself if I had a bit more capable WP device, I might give it a go as a daily driver.
Of course, I'd rather not pay a lot for it....thanks to Lloyd, I was able to get back into the Android world for pretty cheap. I wouldn't even spend that much ($275) on a Windows Phone at this point....
I think I'll end up pulling the trigger. I feel like its pointless keeping the 520, but its like keeping the dumb phone I used when I studied abroad in Argentina....no point selling it so...
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DT2W = Double Tap to Wake aka Knock knock on LG G2
Glance = Moto X style notoification screen, only you have the option to keep the scrren on all the time, set it to turn on and off at intervals, set it to turn on only when you pick it up or take out of your pocket or not at all.
Gotcha - not that big a deal for me. I've lived this long without them