Zoee was on some crappy stuff (I don't remember what, that was almost 5 years ago) when we got her. We immediately switched to what my brother was feeding his dogs at the time and have been on it ever since.
Taggart was on Purina One while at the shelter. I kept him on that for 6 months, until he was a year old, then switched him to the Nutro Natural Choice Lamb and Rice that we feed Zoee.
We've never had any problems with this food and we will continue to feed it to them as long as it works for them.