It has a smooth interface and I like the fitters. Right now they are basically saved searches, but I could see plugging in open-source algorithms of the user's choosing. Mostly, I downloaded 4 clients and found myself gravitating to Primal.
I have never used it, but it also has a built in lightning wallet, which I expect is good for new users that find nostr before bitcoin. I think it's custodial, but I'm not sure. Custodial wallets make sense for zaps.