Carl,

I obtained my MCDBA about two years ago. I definitely feel it was worth it as it helped me move from a unsatisfying job to a fantastic one.

Like most DBAs, I took the two SQL Server exams first. They are tough but manageable. I then took 70-215 (Administering MS Windows 2000 Server) and 70-216 (Administering MS Windows 2000 Network Server). I found these last two harder as it was not an area that I worked with very much.  However, with proper studying, they can be passed too.

If I was to do it over again, I would focus on the more recent Windows 2003 Server for the core networking system requirement and one of the programming related elective exams, which could also be used towards the MCAD designation (if you are leaning in that direction).

I would estimate 30 - 35 hours of study per exam and you shouldn't drag it out for more than 2 months. Not everybody may agree with me but I highly recommend the use of a practice exam software (e.g. Transcender) as part of your study program.

Good luck.