Just finishing my 5th PADI specialty and will soon qualify to apply for the Master Diver cert. Have any of you done so? Is it worthwhile? Any advantages to doing so?
A number of years ago, I did. Knowing what I know now, I would do exactly the same.
The MSD card doesn’t make you a better diver. Accomplishing the steps required to get the card might. Are you a better diver because you have completed the Rescue Diver course? Probably. Are you a better diver at 50 dives, than you were at 4 dives (e.g., immediately after you open water certification)? Probably. Are you a better diver because you pursued additional training (the 5 specialties)? Probably. Is any of that guaranteed? No. One of the specialties I applied toward my MSD card was Dry Suit. After I learned how to dive a drysuit I was a better diver. Becoming comfortable diving a drysuit allowed me to dive more, in somewhat more ‘challenging’ conditions, and that helped me become a better diver. Frankly, I think 100 dives, rather than 50, was – for me – a more significant milestone. I think I began to develop some noticeable confidence right around 100 dives that I didn’t really have before that. But, I have heard others say the same about 50 dives. And, some have said it about 150 dives.
More than a few people are quite cynical about the MSD card. ‘It costs too much, it’s a rip-off.’ Or, ‘It doesn’t mean anything.’ Or, ‘Master Diver’ is not an appropriate term. And, all of those comments are right, for the people that make them. But, they are not necessarily right for you, or anyone else for that matter. The MSD card is very much a personal ‘thing’. It provides some tangible evidence of a diver’s ‘progress’. Perhaps, it allows you to set, and achieve, a tangible goal. For some, that goal may 100 dives, or X number of specialties, or X hours underwater. The specific goal is less important than the existence of A goal of some sort. MSD provides, for some, that kind of goal.
Some shops make the MSD step a special accomplishment. The divers get discounts, maybe some free gear, whatever. PADI supports that concept by making jackets / apparel available to shops, at fair pricing, gear that the shops can give to divers reaching that milestone. In the shop where I grew up as a diver, there were dozens of framed MSD certificates hung on the walls, almost circling the entire shop. It was good marketing for the shop, it was recognition for the divers whose certificates were hung there, it was a win-win proposition. More than a few times I saw customers come in with friends, and point to their MSD certificate on the wall, with not a little pride.
One of the challenges the dive industry faces is retention / longevity of divers. MANY people get certified, but (too) many also stop diving after 1-3 years. There are a number of reasons. But, one of those is that newer divers often do not yet have established networks of dive friends with whom to go diving. One of the advantages of formal training – e.g. the specialties that you complete on the way to MSD - is that it introduces divers to other divers, some of whom may become future dive buddies. It is very easy for us to say here on SB, ‘Just go dive!’ But, that is easier said than done for many newer divers. Am I, as a new and not completely confident OW diver, going to pack up my gear and head for the quarry just in case I might see someone I know, to buddy up with? Probably not. But, maybe the buddy I met in my Rescue class might say, ‘Hey, you want to go to the quarry and practice some skills?’, and that will make the difference.
Programs like MSD offer some divers a tangible goal that keeps them diving, without which they might drift off into other activities. It helped my keep going early. Actually, the competition with my dive buddy, and close friend, to see who got there first, helped me.

I am glad PADI (and other agencies) have programs like MSD. For those divers for whom it is meaningful, it can make a difference. But, the decision regarding whether YOU should do it or not, is very much yours. You will have done the training. You will have logged the dives. Does, the certification / recognition mean enough to you to put in the application, and pay the fee?