Ditto to what has been said. They are very intelligent, and can have quite a range of sounds, and mimicking. But they do require a LOT of attention. I have some Friends in the Virgin Islands, that have a Scarlet Macaw, and a Hyacinth, very neat birds. Some Friends of mine had an African Grey, and like a lot of them, it chose the Husband as it's Buddy, the wife, it would tolerate, but would take any opportunity to bite her. When she cleaned the cage, she would use a stick to get it to perch on, and then she would put it on top of the cage, and change the paper, and food, and water. But the bird, would lean over, and bite her, and she would sometimes respond with "Son of a #%$@#!!" Well one day she was cleaning the cage, and the bird was on top of the cage, and leaned over to bite her, and leaned too far, and fell off the cage, and when it hit the floor, it stood up, and said "Son of a $#%#@!" So they can use some words in the correct context. But they are great pets, but don't be surprised if it chooses one over the other, rather than both. If it bites, or tries to bite, never hit it, or thump it with your finger, just blow a puff of air at it. My Girlfriend raised Cockatiels, and they were also very demanding in attention, and also very smart. And don't think a bird can't make facial expressions. Oh indeed they can! But good luck, and get some good books, on the care and feeding of your parrot. Get lots of toys for it also. There are certain foods, you should avoid, like avocados. It is too fatty for it. Anyway, enjoy your new permanent child.
Wayne