The ported barrel helps reduce the recoil. It can be used the same as any other shotgun barrel. The only negative of the ported barrel would be shooting it at night. It will have a nice orange flame coming out of the ports at night. With the set-up you describe (full choke and ported barrel), it sounds like it was set up for slugs. The slugs have a lot of recoil, and the ported barrel will reduce that. If you get the various Mossberg choke tubes, you can change out the choke yourself for birds, skeet, or whatever. I have all the various sizes.
I also have a Mossberg 500 as my primary shotgun, and I like it a lot. It has been put through a lot and has held up well.