I have a very similar setup, except using YNAB[0]. I never felt like I really used Mint, besides just going and looking at my balances and (infrequently) thinking, "huh, looks like I'm over-budget again". With this setup, I feel like I'm taking matters into my own hands, which has had a noticeable impact on my spending and planning discipline.
Thanks for the link to your project, looks really useful!