I am sure you will have a grand time on Island!
We stayed in this home the second time we went to Belize (2 adults & 2 teens) and it would have been a much better experience for us IF...
a) all the air-conditioners worked in all the bedrooms instead of just 2 bedrooms as there were no screens on the windows or doors to open for any air.
b) the pool was filled and working as there was about 4 inches of water in the pool when we arrived.
c) if there was a TV (for the kids) as pictured in the photo's.
d) a real telephone would have been nice as with the radio phone you had to call someone 5 times to get out your short conversation.
We never did hear back from Mark or his wife about these small problems but I assume they are very busy people, giving dentistry to the Island now I understand too, free of charge.
I don't mean to scare you, our family had a grand time anyway (we always do anywhere) and after visiting San Pedro several times after that and staying elsewhere, we are still in love with the Island!
I would just check about these above mentioned items prior to your arrival only IF they should matter to you. Though I did the same and I was assured all was well.
Have a great time!
P.S. If that pool is up and running... I'm jealous! It's a beautiful pool, deck, home and property!
OH... if you want to fly me out from Maui... I'll cook and clean for all of you!!!