For a part that costs about 56 pounds it's definitely worth replacing. Very reasonably priced for the peace of mind you get. If I had a <2010 I'd be replacing it.
Having to lock the flywheel/crank up is a bit of a PITA because you have to remove the starter (which is a little tricky) but that aside very manageable, a day job tops. Just need a big (read: BIG) breaker and a good torque wrench.

