I have used Casa for a couple of years. The idea of colaborative custody appeals to me but I decided to cancel my subscription. In the end it was a buggy app, the high price (now even higher) and the need for more privacy (they can see all your utxo's) that made me leave.

Eventually ended up rolling my own 2-of-3 which takes a bit of work but in the end provides a great feeling of calm hodling.