I'm relatively pleased with my 10. No real issues with the hardware, however, I do miss the ease of use and features available on WP8.1. Camera is a touch better than my prior phone: Lumia Icon/930. The audio chops are excellent assuming you take the time to set it up. I have 9 profiles created; one for each pair of headphones. Battery life isn't WP good, but I regularly get 2-3 days between charges (NOTE: The phone is awake for 9-12 hours a day, but only 3-4 hours of Screen On Time total). The screen is lovely and the speakers work great for most things. Call quality is on par with other devices I have owned, so no complaints there. Software Security updates have been slow, due in-part to VZW, and that is my only real gripe.
I primarily use this device as a communications device (former BB user), so I don't game or watch movies/videos and I rarely use it to surf the web. No social media either (which always accounts for much longer battery life). Granted, my use-case is definitely an outlier, but not unheard of.
TL;DR: It was worth the $450 I paid for it, and I would buy it again at that price.
~Ex