Parakeets can be fun to have, they have their own personality and quirks. If you have two you have to be sure they can live well with each other though, they have been known to kill each other.
Like humans, cats, dogs and anything else living it depends on the personality of how well you'll like them of course.
I don't know anything about training, but if already has the pets in her house, I'd advise you to observe them for a while in their habitat and see how you like them. You'll have a better chance of getting to know them then if you would only see them for a few minutes at a pet store