I have played with and helped socialize 7 different cape babies. They are adorable. In size they are smaller than or just about the same size as a timneh grey, but their heads are huge in comparison to their bodies, especially the males. I'm told they are somewhat noisier than greys, but African birds are not as noisy as South American birds. However, I've only known them up until a little over a year old, and at that time all the ones I knew were actually not as noisy as Ashlynn is right now. They start practicing to talk young. Their vocalizations are actually quite sweet. However, pois often get much more vocal after a year, so I can't tell you how they end up. For a grey, Ashlynn is on the less phobic, more steady end of the spectrum, and the capes were mostly just like she is. One of them started out growling all the time, which many greys also do. She actually settled down to a normal calmness much quicker than any baby greys that start like this seem to do. Again, though, I've only known 8 of them, and only handled 7 of them myself.
If you know anything much about greys, I would compare capes to greys in personality and talking ability more than to any other bird. Senegals are also pois, but small ones. Some senegals talk really well, but a higher percentage of capes seem to talk really well than senegals. Roni, my senegal, is VERY mouthy. She chews on me, bats her mouth against me, cleans her beak on me
, and she gets carried away and chomps down too hard sometimes. She might see something new and freak out, and she will also get wound up. When either of these things happen, she does not seem to be able to regulate herself. She IS going to bite hard. I find that Ashlynn, grey, tends to also get the same way, but with much less frequency than Roni. The capes I have known were all somewhere either in between Roni and Ashlynn on this scale, or even less wound up than Ashlynn. I hope that makes sense.
So, if you know other pois (meyers, brown heads, senegals, etc.), capes are, in general, on a spectrum of personality somewhere in between most little pois and most African greys. A really good cape would be even sweeter, cuddlier, etc. than an average grey. It is an individual thing.
Of the capes that have been through the bird store, (and you must understand that all but one that I have known came from the same parents), all have been very similar to Ashlynn. They liked to hang out with people, play with toys, and be scratched. Some were more frightened of new things than others, but it wasn't really a big problem with any of them. Roni, my senegal, is much more likely to become frightened than any of them. All of them took to training very readily. The one who was not related to the others is the one I never handled myself, but his owners brought him to the class I took with the vet, and he was marvelous. He took to target training very well, and was a joy in their home. I would not say that many, if any, of them were more cuddly than Ashlynn, but Ashlynn is pretty cuddly for a grey. However, I will say that all of them were more likely to be nice to everyone than Ashlynn is. Ashlynn will sometimes decide she doesn't want anyone except me to handle her. However, she never did that at the bird store, and I only saw these capes at the bird store, but I will admit that capes are known for remaining open to handling by lots of people while greys are known for becoming one person birds or liking only a selective few people.
Cannnary has exacted a promise from me. She wants a cape in the worst way. She doesn't need another bird right now, and she isn't old enough to be responsible for raising a bird like a cape at age 10. However, I have told her that if she is still this interested in a cape when she is in seventh grade, we will look into getting her one then. She will, of course, have to help pay for that bird. However, you can see that I am pretty comfortable with capes, especially the capes from these parents, to be making such a statement.
I have heard of capes who are very, very noisy. They scream constantly. I have also heard of capes who bite viciously. There will be individuals of every species who have issues in captivity.
You also need to know that African birds in general are known to be very aggressive toward other birds. You may find African birds who get along with others, but any African bird should be expected to want to kill other birds until you find through interacting with the bird that it does not. This way, you won't be disappointed if you get an African bird that cannot be trusted to be around your other birds.
I actually recommend a cape very highly. I was surprised when I went to the web site you posted the link to and found that the capes were priced similar to the smaller amazons and actually less than the greys. (I think I am remembering that correctly.) Here, a cape is as more expensive than the more common large macaws.
Cannary has asked me to add a smiley face to this post to show her excitement over some day acquiring a cape.