I have only been diving with Dive Paradise once, 5 years ago in July, 2012, during a Scuba Board Cozumel Invasion. I agree that they are certainly competent operators, safe, with perfectly adequate DMs (at least when I dove with them). I won't say anything bad about them, other than they are not my cup of tea. Too much a "by the numbers" dive op - first dive, 80', 45 minutes, 45-50 minute SI on the boat, second dive, 60', 40 minutes, back to the pier. IMO, they are more concerned with keeping a schedule than with providing great dives. My personal preference is Aldora, because of (not necessarily in order of importance): (1) HP Steel 120 tanks, which not only give you 50% more air and extraordinary bottom times, but also, IMO, much better bouyancy characteristics than Aluminum tanks (they don't go positive at 500-700 psi, making you fight to stay down on the safety stop unless you overweight at the beginning), (2) long bottom times and a long SI at a beach club, and (3) super DMs. I have also done a number of dives with Dive with Martin, on multiple group dive trips, and they are, IMO, an excellent low cost, no-frills Dive Op. I would personally opt for either Aldora or DWM in preference to Dive Paradise, but that's just my opinion. It really depends on what exactly you are looking for. If the convenience of an on-site dive op with a schedule that permits a two-tank dive in the morning plus an afternoon dive appeals to you, and a "by the numbers" dive schedule doesn't bother you, Dive Paradise may suit you fine.