They are the reason my husband doesn't dive.
We did a Discover Scuba with them back in '02. So take it with a grain of salt- maybe they've changed.
My husband has asthma (caused by allergies or caused by exercise- we don't know- they didn't require a doctor's okay and didn't inform us of the potential risks). Our friend, who dove with us, has diabetes- he had the insulin pump with the needle inserted in his abdomen- had to remove it for the dive. Again, no doctor's okay, no risks mentioned.
My husband had a panic attack on our second dive and they forced him to finish the dive for another 10 minutes by adding weight to his belt. I'm not a DM, instructor or dive professional of any sort- but, I'm thinking that if you are paid to take someone (who has no certification) on an underwater tour and that person has a panic attack at 30 feet, especially if that person has asthma, you should probably thumb the dive.
So that's my opinion.
I still have the little Reef Trekkers decal they gave us- that's how I know it's them
Oahu Scuba Diving - Dive ReefTrekkers Hawaii - Waikiki, Honolulu, Oahu, Hawaii
Please, mods, let me know if I need to edit this.
TG
PS Yes, I know that with asthma, he probably wouldn't be diving anyway. But he would have at least gone to the doctor to check it out and see- so that's why I say they are the reason.
**edit**
wow- all I did was put in the URL and it automatically changed to the big long pretty link.