Green Wallet has self custody liquid and I think it uses lightning swaps to interoperate with lightning. Best for medium sized lightning payments like 5000 sats, like a coffee or more, since fees for swaps can be around like 500 sats, though direct Liquid to Liquid fees are only about 20 sats per transaction. Extremely easy way to store bitcoin in a private way that also has low fees even when onchain fees get high. Still self custody, but you have to rely on the Liquid federation to remain viable into the future against all government attacks. That's the main set of tradeoffs. You can always swap liquid back onchain as long as the Liquid federation is viable though.