Very simple, very easy to use. A few clunky quirks (changing a recurring item that synchronises with iCloud is harder than it need be), but for the price, its highly recommended.
... Or was. Ive recently become aware that iCloud synchronization is missing items. Going through history looking for the inconsistencies is painful.
Reported to the developer, but no fix as of yet.
thedave.ca about Accounts 2 Checkbook, v3.3