I'm up and running with it and have been since day 1.
Like many folks I stayed with 2007 for as long as I could, and got lured in with essentials. I didn't like it, but I had issues with iBank and others too.
I was happy to see the new release - it's not perfect, but it's nice to have mobile support and quicken connect to grab transaction downloads with no bank fees.
The data migration (over 15 years of data) was a pain, but it was going to be a pain no matter what I migrated to. All in all, it wasn't that bad.
Investments is still a work in progress. I have a couple of 529 plans for my kids that aren't listed funds with symbols - so they have to be updated manually...well, 2015 for mac can't do that yet. So every month when I make a new 529 contribution to each account I have to manually adjust the accounts. It's a hassle, but according to the quicken boards manually updating securities pricing is coming.
I'm very happy with the mobile sync and support so far - being able to have my wife (and I) look at the running budget during the month is a great thing.
All in all - it's not perfect, but it's a good update.