I was a patient of Dr. Gubler's for many years. The last 2 root canals I had done at his office went very wrong. Both had to be retreated, one was saved by a specialist while the other had to be pulled out.
It was quite some time ago and it makes me feel a little better knowing that the doctor in question is no longer with your office.
I did receive a call from the office and they were very eager to do what they could to remedy the situation.