We were there in Feb, 2012 and they really took good care of us. I had communicated with them via email for about eight months before our tour and they answered all my questions. We had two adults and one six year old girl. We went on the grey whale tour, then swim with whale shark, then swim with the sea lions, then a fishing trip. They were the reason we booked to stay in La Paz, down the street from the tour office. The carnival was during the week we were there too. You will have the adventure of your life time.
Definitely make sure your hotel knows you are using them so that you are hooked up with the agency right away as you first check in the hotel because the tour agency needs to confirm you are there. I would schedule the fishing trip in the beginning of the trip rather than later so you can actually finish eating the entire fish!
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