I have the all in one and really like it. I use it all the time. However I haven't touched the tweak station and metal case that came with it since I got it. If I had to do it over again I would save myself some money and just get the base Hudy setup gauges, a separate tweak station with bubble level and a leveling setup board like the Integy setup board.
The tweak station is a very important tool and you'd be surprised at how many people don't know how to properly use one. As far as I'm concerned the directions in the following article is the one and only way.
If you're looking at setup boards and tweak stations don't be tempted by the Integy setup board with built in tweak station. It's junk. I had it and both bubble levels were significantly out of calibration. I'd be surprised if most of them weren't exactly like the one I had.