Hi,
I just got back from Los Cabos, and did 4 trips with Sunshine Dive & Charter. I was very happy with the service provided, plan to dive with them again on future trips, and can recommend them. Very professional, knowledgable and friendly staff.
All 8 dives I did were in the bay and were enjoyable. I particularly liked Lands End (which included a visit with the sea lions), Neptune's Finger, and Middle Wall. However, there aren't that many sites so I would suggest that you get confirmation that they're able to take you out of the bay into the Corridor or further afield if you are going to do more than 3 or 4 trips and want to get to a variety of dive sites. As mentioned above, no hard coral to speak of but common soft coral. Lots of fish, however.
I did bring along both CO and O2 analyzers, and used them with no unexpected results (30% O2 (the "house blend") and 0ppm CO).
Water temp at depth ranged from about 64-70 F, and I did get a bit chilly on one dive in my 5/4 wetsuit (without gloves or hood). But, not chilly enough for me to want to suit up more.
Very enjoyable diving and a great place to visit.