Cape parrots are somewhat rare (in the US), but I believe they are fairly similar behaviorally/personality wise to other members of the poicephalus family. What kind of questions do you have about them? Anything specific?
All parrots are fairly similar in some regards- loud, messy, costly upkeep compared to other pets, can bite on occasion, attention needy, dietary needs that require fresh produce and daily prep above pouring dry food in a bowl... They also all have great intelligence and the potential to be wonderful, strongly bonded companions.