We are using it this month. Working very well so far.
We've never had a budget before, so we are seeing general benefits that you wouldn't get if you already did a proper budget, but the accountability to each other and the machine has already significantly decreased our irresponsible spending. Restaurants, for example, is coming in waaaay under budget, because we cook out of our pantry instead.
We also get a kick out of adding windfalls to the income section.
I do like how they sorted items into tiers and then report those categories in a pie chart. We wish we could rearrange the tiers so, say, medical appeared above lifestyle, but that's a minor complaint. There's also a slight toggling bug where it's hard to get our cursors to "let" us access the detail popup for any given budget line item, but it's otherwise very user-friendly.
The iPhone apps works very well for adding transactions on the go. We are not paying for Plus, and I think we'll keep it that way. We prefer to make the effort to enter them ourselves so we stay conscious of spending, and also so that transactions post on actual day of purchase, not when some bank machine finally posts the transaction after the weekend or whatever.
