Not a lot of conversation here to go off, but I'll provide what I can.
I'm a former Casa user. They had a good product in 2021, but I can't speak to it much beyond that as I haven't used them since. I personally dislike that they support coins beyond bitcoin.
Unchained is an option I actually considered for a bit. Their fees don't seem crazy, but have kept me from actually using them yet as I haven't set up inheritance and just work with a multisig I rolled myself with nostr:nprofile1qqstu7jjjx6n969erredexq539y2x0f7pks80zxhg9hh8dx8298s3espr4mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmp0gqytvz's Sparrow Wallet and nostr:nprofile1qqs9v9et20mnqagtgrnrc5qmzcrgmkt2y3087p23vawqlmyczlhfdcqpz9mhxue69uhkummnw3ezuamfdejj7qgmwaehxw309anx2etywvhxummnw3ezucnpdejz7urfvdesz9mhwden5te0wfjkccte9ehx7um5wghxyctwvshs7l4vwu's ColdCards.
I understand the draw of collaborative custody and having a 3rd party hold a key, it's just not something I've persued at this time, but am likely to in the future as I begin to consider inheritance. I can definitely get on board with having a company that can assist your heirs with recovery.
As to Nunchuk, I like the wallet but am unsure of the details regarding a collaborative custody option (i.e. if they have a collaborative option, who holds the recovery key, or the workflow for recovery or communication with the 3rd party keyholder.
That said, I do like their integration of a chat option within the app for communicating with holders of keys within a multisig setup.
I'll have to dig into some of these options more at some point in the future.
