SWMBO did her open water certification in AC January of 1999. Since then she has dove 40+ times all in AC. She is definitely NOT getting tired of it, and I have the bills to prove it! We even have tanks here at "Tara" so that she can practice whatever it is you practice in our pool. In spite of her ADVANCED age she has been very active (kickboxing, rollerblading, English dressage) and absolutely loves the scuba thing. I could care less about going under that water and it bothers her not. This is a great deal...she loves to go AC and dive and I get to do point blank NOTHING if I wish. PERFECT!