I have had to use my DAN insurance, and was very pleased with the entire process.
Keep in mind that the DAN insurance policy is a "secondary insurance". That is, it "kicks in" after your regular health insurance has paid for what ever it ( the primary) covers.
My experience:
In 2004, I had an incident of DCS2 while in Grand Cayman. I had to pay, by credit card, both the hospital fees and the separate chamber fee. I'm not sure if that policy applies in all hospitals/chambers or just the one I happened to be at.
When I arrived home I filed papers with my primary health insurance carrier.
They paid the majority of the medical bills, including $15,000 worth of "chamber rides".
[While my primary insurance covered this expense, I have been told by several other divers that, based on their experiences, DAN would have also covered that expense.]
After receiving that payment, I submitted uncovered bills, Drs. notes, etc., to the DAN insurance people (The actual policy was from an insurance company who has an agreement with DAN). The paperwork seemed less noxious than typical insurance paperwork, and the service was very good.
That policy reimbursed me for:
1) Some medical costs not covered by my primary insurance carrier.
2) The cost of two plane tickets home, when we could not reschedule on our original airline.
3) The cost of shipping home all our luggage, including dive gear, as I had written orders from the doctor to not carry, drag, or lift anything for two week period.
4) Most of the cost of three additional days at the hotel, also the result of written orders from the doctor. The three days were required for more medical treatment, and medical clearance to fly.
The reimbursement for these items totaled approximately $2700.
Additionally, similar to Rick Inman's experience, the folks from DAN were in communication, on a regular basis, with the Doctors and the members of the "Chamber team", during the time that I was in the hospital, and called me during the time between being released from the Hospital, and being medically cleared to fly home.
Also, they, with the Drs., were looking ahead to plans for a potential medical flight/ then train ride home which, thank God, was not necessary.
As a result of this experience, I would never dive without having the DAN insurance.
I give that product my highest endorsement, suggest that you purchase it, while hoping you never have to use it.
Good luck,
Mike