What do you like about it, do you find certain features unique that you can't find in other places?
I do envelope budgeting and when I started I found YNAB to be the best. In subsequent years there have been competitors, most notably Actual (
https://actualbudget.com), but I've stuck with YNAB because I've had no reason to switch.
Envelope budgeting is very different than expense tracking (like mint.com does) - it enables you to be mindful of your spending and to plan ahead for future expenses (eg Yom Tov).
I still use Mint extensively in order to have a 1 stop place to view all my transactions - very useful for DDFers who have tens of accounts. But I do not use it for budgeting.