Okay, I started this thing so I thought it only fair to follow up. Used them the first day of diving in Utila and they made absolutely no difference at all. Still had trouble equalizing and had some vertigo and that wet "slushy" feeling in my ear the rest of the day and through the night. Skipped the second and third dives that day and had that old familiar "squeak/crackle" sound in my ear every time I swallowed.
The next day a more experienced diver on my boat suggested I try a different approach. I left the Proplugs in my bag and instead, started equalizing at the surface.
He then suggested I gently equalize every two or three feet. He also insisted that I put my head all the way back as I equalized much the way you see people do when they have a nosebleed. His theory was that it somehow helped the "path" of the eustachian tube and made clearing easier. Well, I can tell you it worked like a charm. Did multiple dives every day and never once had a problem after that. I was the one who went on the earplug quest after actually perforating my eardrum two years ago while diving. I didn't think I'd ever be able to dive repeatedly witout having ear problems. It seemed like I was holdingmy nose and blowing every other breath but in reality, I wound up meeting everyone on the bottom at abou the same time. Because I was doing it almost continuously, it wasn't as if I actually "stopped" every few feet, and I never had to go up to relieve the pressure and try again.
Now, I've talked to a lot of people who have used the plugs and loved them, so I guess there must be something to them. However, I'm sure had I used the same method of equalization the first day with the earplugs in I would have had the same result and thought the plugs were the greatest thing since sliced bread.
Do they work? I don't know. But at twelve bucks a pop they're worth a try. I don;t think they can hurt. I'm just glad I got some free advice that really changed my diving experience completely.
PS- Many ENT's including mine recommend a combination of Afrin and Sudafed as well.
You might want to ask your doctor..............