Yeah, as a relatively new user I set it up as one of my relays... Here's my experience:

When I first got on Nostr I set up a large number of hashtag follows related to my interests. About ~90% of these hashtags *only* show up in my feed when they come over the Mostr bridge. This supports the general narrative that discussions on Nostr about topics other than Nostr, Bitcoin, and Red Meat are pretty thin.

However, most of these posts have 0 comments... And the few times in which I do comment, I get zero responses or engagement, which just makes me think that nobody on the otherside of the bridge ever sees them.