After my daughter had gone to Occupational Therapy at PCH for more than a year, we transitioned her to Piller.
Her therapist has made strides with her in such a short amount of time.
We are really happy with the progress our daughter is making.
The process is a little different from our experience at PCH, since the parents do not go into the therapy room to observe therapy. It is more difficult to learn things to do to reinforce the therapy at home when you cannot observe it. However, I think my kiddo is less distracted when I am not around. That means she is, hopefully, more productive.
The nice thing about the waiting room area is you get to meet other parents who are there for similar reasons. It is always good to meet people who have gone through or are going through the same things.
Also, if you need to leave while your kiddo is in therapy to run an errand, you can feel free to do so. There is a shopping center nearby for those who want to use the time to get some things done.
I am happy with Piller up to this point. I would recommend them to anyone looking for OT services. They also have clinics in Gilbert and Mesa. :)