If you choose to go to Pacific Wilderness (which I hope you don't) make sure you get a trainer who will take on the responsibilities of a "TRAINER".
The shop in San Pedro is in a very bad part of the city. True, they are very friendly, but they sold me a mask that clearly doesn't fit me correct. I went in, they made me try it on and said, "Yup, it fits" but little did I know at that time, it didn't. My top lip was pretty much covered.
The one in Orange is located in a better area, but the trainers there aren't helpful at all. If you struggle, they will make you re-take the confined water test with another class (whom you've never seen before so that'll make you nervous) and toss on a fee on top of that.
I'm talking about my personal experience there. I had the honor of transfering my paperwork (quizes, exams) to another trainer and completed the course without a problem.