Definately have to recommend
St George Underwater, I am doing AOW with Sydney Dive Acadamy but purchased all my gear from St George Underwater because their centre is literally 4 times bigger, and so range is good and the owner Kell is a top bloke with loads of experience. I got my fins, mask, semidry, hooded vest and boots at a great price and will be diving in them this weekend
There are two dive shops in Cronulla, one in the main mall and one in between the petrol station and Maccas on the main road. I did my OW with Cronulla Prodive (the one in the mall main street strip thing) and it was actually quite a thorough course (as far as OW goes... :/ ) but nowadays its quite expensive for day trips.I went once out the back of Cronulla (this was years ago now) and my wetsuit didn't really fit. Water temp was 17 Celsius and long story short was the worst dive I have experienced. This was due to my inexperience. However they really didn't choose a good dive site. There were 2 Gropers.
So..
St George Underwater have a club which dive every weekend and to join is only like 50 bucks. Then if you need gear as well its a bit cheaper than competitors at around $50 for everything. If you wanna join the club on a dive you just ring them up and let them know what gear you want. Then you go meet at the shop grab your gear and go with the people. (They're really friendly, at least when I was buying gear ((and i spend ages in the shop..)) they would all say hello n stuff)
I'm only 18 and recently getting back into Scuba (got OW at like 13) after a trip to Fiji. Shopping around various LDS to see where my loyalty should go has led me to St George because being the biggest shows they are successful for a reason.
Let us know how your experience goes!
P.S. Here's their facebook
https://www.facebook.com/pages/St-George-Underwater-Centre/128674053887699