I have a cavalier - no experience of cavapoos but they cavaliers are so sweet!
Please please be careful of breeders though, cavaliers can have a lot of health problems and just because crossed doesn’t mean they will be ok! You need to ensure the parent has had all the tests. Cavalier matters is a good site to research.
Cavaliers thrive on attention and love cuddling up with people. You need to bear that in mind, ours doesn’t have separation anxiety, but he loves being with other people and dogs and he follows me around the house (unless up to mischief).
They aren’t the easiest to house train and training takes a long time as not so intelligent but crossing with a poodle may improve this (but is very hit and mix).
Personally, I prefer the look of cavaliers than cross breeds but cavachons are supposedly calmer.
Tbh there are so many needing rescuing at the moment that I would look into this. I know I’m tempted to get a rescue myself but think my DH and Dcat may disown me! Many Tears had a lot of dumped breeding dogs (cavapoos / cavachons included) and I know someone who has had lots of cavaliers from there that have been a joy! But they often only rehome with another dog so another charity may be better!
Please please be careful they are prone to backyard breeding and puppy farms. There’s a good cavapoo lady in Sussex - I’d look at joining her (long) waiting list. She sees them as a breed rather than a mixed breed.
I’m not a hater of cross breeds - people can make their own choices - but puppy farms / poor breeding keeps me up at night and I hate the thought of any dog being subject to it. 