I am using it for several years now.
This has become stable now. I wish there would be more incremental improvements.
1) support for accounts in other countries, mint support than but dies bit convert currency not even allow to have fixed conversion rate.
2) there week amex transaction lost for few weeks got them back only after delink and link again in that attempt lost older transaction.
3) mint bills could merge in same app.
atghate about Mint: Budget & Expense Manager