Living underwater is also a wonderful dive op. Jeremy of LU is, like Memo and Dave from Aldora, a top shelf supremely excellent guy. Where Aldora edges him in my mind is if Jeremy gets a group of inexperienced divers...he only has one boat and that means you dive the inexperienced profile. Aldora has something like 8 boats and can normally find a group of good breathers who can go deep and still hit 90 minutes.
Still, I very much enjoyed diving with Jeremy. He is absolutely my kind of diver. As yet, I have no experience with the other steel tank ops....I'd like to, but I simply can't fathom how to improve upon Aldora or Living Underwater (with a good group.
Bill, I hear you and have expressed similar thoughts to Jeremy (when he always asks for my feedback on every trip). He runs two boats where he has sufficient divers and separates them accordingly but that tends to be Christmas, New Years, Spring Break). When there are not, he sends them up as they get low on air. Usually he sends up his own buoy with them but if they have their own and can deploy, then that's what goes. So I'm able to get long dives even with newbies on board for the most part. Not always, but usually.