Well I can't speak to Windows applications but I can say this is not ready for prime time.
I know people don't like the lack of functionality with Quicken Essentials for Mac but at least for what it did it was reasonably well designed and reliable.
Quicken 2015 is awful, the lack of color in the UI make it hard to read. At a glance is something the hipster programmers avoid at all cost. Also the quick sidebar links, Last Download, Scheduled Transactions, things like that are gone. Everything seems to take multiple clicks and drilling down to find.
There are flaky implementations all over this thing, for example on a scheduled transaction they show 2 list entries, one for credit, one for debit. Of course the Register and Overview just show one transaction per line with both accounts and a transfer type.
The Mobile application undoes the passcode every time you log out. Also the odds of getting all accounts to update are slim at best. If your a Wells Fargo customer, forget mobile completely. The mobile pie chart is completely laughable, not labeled in any way, you spin it to see the category and value, one at a time.
They love mouse over, they have pie charts and graphs in pastel colors that are useless until you mouse over to see the value, of course the thought of displaying two values at a time is not possible.
In the end its poor design and flaky, its all about the latest style, usability is secondary.