My experience with Aquatica was 100% positive to say the least :) My wife and I booked for a 10 dive package and we both thoroughly enjoyed the experience.
We actually chose Aquatica in the first place because they were by far the most efficient and helpful with replying to e-mails when we were planning the trip in February. Within a small few hours of an e-mail asking for prices, dive sites and so on we had a reply from Daryl listing out sites we could go to (we only have Open Water certificates) and all other details.
The instructors were fun on the surface, but also very professional and reassuring in the water. At no time did we feel left to our own devices. We were always given an option of which sites we want to do, although generally just going with the instructors' recommendations was a good idea, as we were always happy with their choices. As opposed to our previous scuba experience, we weren't persuaded to join the AOW divers, but rather if a dive site was to deep/difficult, we were taken separately by a different divemaster for an easier dive.
On a few occasions I was personally feeling a bit uneasy because of the weather (big waves) but every time the instructors made me feel secure and happy, and if need be, took more time to ensure that I am OK.
On a final note, big thanks to Camilla and Alan for the fun experience and for the night dive, that was great great fun!