I'm wondering what all the certs mean, is PADI "Open Water Diver" what I'm after?
Michael, perhaps you might review
Consider a Diving Club - ScubaBoard
Diving certification agencies are a lot like cars, if you own a Chev and have had no exposure to other manufacturers, you're likely to think that Chev is the best. This also extends to equipment. "I use brand X, so brand X is the greatest."
Like I've pointed out on the other thread, it depends what you want out of your training. Some just want to get certified quickly, others want a more comprehensive approach. Only you can choose what's right for you. If you want to be trained, compare the number of training hours for the price and you will have your answer, either way.
Like in anything, there are instructors from all agencies that put more into their training courses, while others are happy to teach to whatever is minimum. I encourage you to find out what you are getting into. Don't necessarily believe the hype and the marketing machine that some agencies / dive shops have in-place.
Regardless of the agency and all things being equal, you should be able to learn more in 30 hours than you can in 20. My basic OW programs are 50 hours, but are more in-line with people who want to be challenged, than just to obtain a certification card the easiest way possible. Each instructor has their own training philosophy. Compare and find which one is most suitable for you.