I have and I did like it. Maybe next week...
Have had the Lumia 1520 for about 3 months.
It was too big, for about a week, now feels right sized. My wife has my old Lumia 920, when I pick it up, it feels so small. My eyes aren't what they used to be, the screen size is great, for me. One handed is a trial, but, I put a case (black ribbed w holster) on my Red Lumia 1520 - this makes handling a lot easier (slippery bugger). The screen vibrancy, the camera, surfing the web on a 6" screen, etc - did I mention the camera !
I have Dev Preview WinPhone 8.1 loaded. After about 3 days, it calmed down, battery usage is approx. 5% hour, with everything I want running. Battery before was a tad better,
always made it thru the day.
Don't know what you're going to do ... I wanted a phablet & it's the best spec'd Windows Phone out there (I'm on AT&T, Icon not available, I have other niggling little issues w the Icon). I was in your shoes, thought it was a tad BIG. Hold it to your face, it's big but very usable, open the browser, view a website, slide it in your pocket (back or front) it fits - though I use a holster sometimes, clipped to my side.
BTW: I bought mine (AT&T version) on eBay for $425 - MS store has it for $549, there are 5% off coupons floating around. (check the link) and Microsoft stores are giving away FREE phones, today, in store.
Reveal the Deal
Price on AT&T is $585. If you go the web route, do your due diligence re: seller. Unlocked my phone, a week ago, requested & received the unlock code from AT&T. Though, I do miss the QI wireless charging w the AT&T variant. My wife now has my old wireless charger for her Lumia 920.
Good Luck w your decision.