Lobsterexplosion:
The medical is just a pain, but it is doable. If I might offer a suggestion, do NOT use the doctor at the Al Alhi hospital. Use the other facility (can't remember the name). You will pass using either one, but the equipment at the Al Alhi hospital seems to be a bit flaky and the doctor will send you off to several specialists to have them sign you off. It takes time and is a bit stressful, but have not heard of anyone not passing, and there are some over 55 doing an initial.
You will need cash to pay for the medical examinations. It may cost up to 1,500 QAR depending if you get sent off to some specialists. Submit all bills to the fleet secretary and EVENTUALLY they will be paid.
The medical requires two visits to the hospital/clinic. It is early in the process (first week) so transportation is provided. The second visit is to cover the results and have the doctor sign off the aviation form for your license. A copy of this must go to the fleet secretary when you turn in your receipts.
The eye examination is no worse than anything experienced in other exams.
Once again, when arriving here, have access to a fair bit of cash. If you bring US Dollars, they must be printed since 2007 or they may be rejected (as I found out at the hotel). US Dollars exchange at a fixed rate.
The first 10 days are very, very busy. Water and rest, as much as you can for the more senior chaps. For the younger lads... party on
(though you may find the prices in the bar a bit daunting).