Started my son there at 4. This is located at La Camarillo Tennis club (it is separate from the club, independently owned and operated - I think).
The pool is located Outdoors, which as far as I am concerned is the only way to swim!
This is owned by a woman. Lori, who either answers her phone directly or calls you back right away. My son LOVED all of his coaches. This place was not a zoo. It is well run, calm, and not a bunch of chaos.
Which can be caused when people try to over book their companies (Hubbard comes to mind). My son looked forward to going every week. Not only did he have a lot of fun, he is water safe! It seems a bit pricey, but is worth the money for my peace of mind. I don't dread going (as I did at Hubbard). He is in a safe, clean environment and has a ball!