Budgeting is not an enjoyable thing, and Spendbrite isn't going to inject the process with joy, but it does make it easy to quickly put one together by focusing on the important information and ignoring pointless details.
When you input your monthly budget into Spendbrite, you set categories that can be as vague or specific as you want. As you spend, you just need to input the total amount and move along. What you don't have to do is enter all your bills and detailed information about your earnings. If you get a regular pay cheque and your bills are consistent, you don't need to itemise them. Instead you just enter how much you make per month and how much always goes to bills. Spendbrite focuses on shortcuts like this rather than forcing you to input a bunch of information that doesn't really matter if you're just trying to get in control of your finances.
If you just want to create a simple budget where you have total control, Spendbrite is a great, free tool. It is in beta, however, and has a few bugs here and there (for example, sometimes the interface froze for me in Chrome, though worked just fine in Firefox), but overall it's pretty nice.