What do we think of Marc (5th Doctor companion)?

So I know Marc is still a relatively new Big Finish companion and his run also wasn't that long, only around 9 stories I believe. I've listened to his audios up to and including Warzone/Conversion so far and I've been enjoying his stories, his character, interactions with 5, Nyssa and Tegan and his perspective on things.

Without spoilers I'm wondering if his run continues on in good strength, but also what other people think of Marc as a character and of the '5, Nyssa, Tegan, Marc' TARDIS team in general, as I never see anyone talking about him (which I suppose might be because of his late introduction into the main range and shorter tenure).