Ive actually bought a majority of my plants from petsmart. Ive had success with al of them really except dhg but that really has nothing to do with the quality of what they were selling.
As for my anubias, I have bought anubias nana, congensis, and afzelli all in the tubes and they are all doing great. I attached my congensis to a higher branch on my driftwood and the roots have actually grown long enough to root themselves in the substrate. Very pretty to look at. All three plants are very healthy and producing new leaves.