The commander has a dirt simple fuel system...one big tank. No issues with crossfeed or fuel mismanagement...everything is interconnected, it all comes from one source, and one may consider all interconnected fuel tanks as one (all 22 of them).
The airplane is a single pilot design which doesn't require a type rating (AC690, for example), yet is every bit as complex and detailed as aircraft which do require a type rating. One should seek adequate training on type, rather than picking up the book and teaching one's self.
From a maintenance perspective, there are certain "gotcha's" that are repeatable (keep cropping up) and can potentially create problems, such as the pneumatic plenum in back, and getting to some of these poorly designed and poorly placed items can be a bear.
As light twins go, it's a rocketship.
It's got specifics that you need to know that can hurt you: the typical identify, verify, feather routine will burn you in an engine out if you try retarding the power levers to "verify." (you'll get a big drag increase).
You may find the ground handling takes a little getting used-to. It's common to see new commander pilots making very jerky side-to side motions with frequent application of brake as they try to figure out the foot pedal steering. It works a little different than most other aircraft, with brake pedal steering proportioning valves.
It's a fun airplane, flies nicely if it's maintained properly. Maintenance isn't cheap. Or shouldn't be.