A quaker or monk parakeet can be a great pet for the dedicated owner. They are rambunctious and require a lot of time. They are not for everybody! They can be loud, very loud. Also, they tend to be territorial, therefore their cage should be rearranged at least every 2 weeks or so. They should be on a pelleted diet as seeds and sunflowers can cause them to suffer from fatty liver disease. If you decide to look into owning a quaker, make sure you do your research before you purchase.
I have had mine for 5 years. I love him and wouldn't trade him for the world!