I just returned from a weeks stay at Casa Del Mar. We had a regular hotel room on the second floor. All the amenitities were adequate. Nothing spectacular, but nothing bad either. We ate quite a few days at the hotel restaurant and it was all good. They don't have a large menu, but you can eat a few meals there and eat something different. We dove with Del-Mar Aqautics which is right over the pedestrian bridge from the hotel. They provided a very enjoyable week for all. We had a group of 27 divers.
We did a lot of dives off the dock in front of the dive shop. Just go in on the ramp, and head north. There is a lot of little things to see and it is a great night dive. We did two boat dives each day and did two more dives each day from the dock. It was not spectacular diving, but it was good. Sometimes off the dock there would be no current, and other times (late afternoon) it usually picked up a little. We would go about 30 minutes north of the dock and then come back. It was about 20'-25' deep. So you can easily get a lot of bottom time.
We did go south towards to the cruise ships, but there wasn't a lot to see. The dive shop recommends that if you go outside the bouys, you should take a float with you since there is a lot of boat traffic in the area. The shop only had two floats for their classes. So we just made sure we didn't surface. We dove all week without any problems.
You can also go to the end of the dock, and follow a 330 degree heading. After about 2 minutes you will come across a large area that someone made a rock wall in the shape of a large oval. They also took a bunch of tires, secured them with ropes to the sand, then put air in the tires to make them float. It is something neat to see. The dive shop said that the one boat owner has been working on this for a couple of years just to play around. It is starting to make a nice little artificial reef.
If you have any specific questions, feel free to pm or post.
Jeff