For the most part, our stay at Greenland was great. It's a beautiful place in a beautiful area of the Philippines. I never met Jack directly so I cannot comment on him specifically, but the caretakers Toto and Joy were great--friendly, helpful, and very easy to talk to.
There were some things about our trip that made it less-than-ideal. The big one was having a wallet stolen from one of the rooms. Though, ultimately, I feel the fault lay with those in my party for not properly securing our valuables, I do feel that an explicit warning about theft (the police said it happened often in this area) and then a tutorial for the safe would have pushed us into the direction of vigilance. I guess the 8 foot concrete walls around the complex made us feel more secure than we obviously were.
The house was well-furnished and immaculate. The kitchen had nearly everything we needed to cook. The view from the porch was so peaceful, and the trees were amazing. One nuisance was the water pump, every time the water was used, it clicked on and made a high-pitched noise for a minute or so, which was no big deal...unless someone used the toilet at 3 in the morning. I was woken up each night by this sound, and at first it was just a silly quirk, but by the last night, it was really frustrating.
The beach is very close and it's a great beach to swim. There's also a little hut to sit and watch the ocean. You can see Apo Island from the shore, and it's really a great view. Really spectacular and we had the whole beach to ourselves.
All in all, a good, though somewhat rocky experience.