Read what you sign with them carefully. If you have a child receiving injections with them they WILL charge you $500 to $1000 without your verbal consent and you better hope your insurance covers it.
I've stopped all business with them , have lodged a complaint with the Texas Medical Board, and now I'm having an attorney draft up paperwork to try and keep them from sending me to collections for what I feel are fraudulent charges.
Pros: many locations
Cons: billing practices