Well, I bought a 920 in Dec 2012. Loved it, but decided a year later to sell it and upgrade to a 1020. Never loved the 1020, the photos seemed no better than the 920 to be honest. Sold it and bought a Nexus 5. I needed to see what Android was all about. Nice phone, lovely screen, but felt quite cold about it. I heard about the Lumia 930 and made a decision to listen to my heart and return to the Windows Phone fold. I bought a 920 on eBay for ?145 and replaced the black housing with a red one I already had. The screen was immaculate so I ended up with what looks like a brand new phone.
It doesn't feel like an old model, I put 8.1 on it and it flies. When got it, I flashed it with the generic GB firmware, opted not to restore a backup, and installed the dev preview. I have had only one problem (which I was expecting) - I can't access my work network which uses a proxy. I get no lag, get WhatsApp notifications and have experienced none of the 8.1 issues posted in this forum.
I'm now happy with my phone. The 920 is a gorgeous device, I even love the heft, lol.