I use this on nearly every project and I love it.
I always start off doing everything I can not to use it for the sake of having fewer plugins, but it almost invariably ends up being the best, quickest, and most powerful solution to whatever data entry problem I'm having.
The learning curve is decently easy (if you can code) and once you've got it, you'll find yourself amazed at the ease and possibility. It has the ability to easily set and change fields from PHP, which is so useful!
You can use this one alone to do so many things you would have installed more plugins for.
Don't spend hours coding some crap yourself. Use this. Light, quick, excellent.