I was on the GA 1 from Sept 2-9 this year. What a pleasure! Only complaint from all 7 rooms (our group had the entire boat- so we talked) was a lack of water pressure in the upper deck rooms after the last dives when everyone was trying to shower. Thats it. Hot tub was used daily by many in our group. The crew was outstanding. The land tours were led by very knowledgeable crew. Lenin (one divemaster) led some of them with Nelson (the other divemaster). Lenin is an ex-park ranger so knows his stuff, but his English is a bit weak. Nelson translated and did a great job. Of course, we also had 4 people who spoke Spanish fluently, so that helped.
Dive briefings are thorough and very detailed. Had the conditions cooperated the diving would have been spectacular. We had some rough seas to Wolf and darwin, and had green water (traveled thousands of miles to get So Cal conditions :-( but lots of fish life- just no whale sharks).
The food was amazing. we had a vegetarian with us and the chef duplicated as best he could the same dish but without meat. So instead of feeling like an afterthought, she felt like she was eating with everyone else. On other liveaboards she was usually given steamed vegetables or grilled cheese. This shows an amazing attention to detail. And her food rocked as well (some of us may have snuck some of that vegetarian as well).
I would travel with them again in a heartbeat.