The resort is excellent and the owner, Edgar, is a great host. For the price this is one of the top resorts in the Philippines. The resort is not on the beach and Sibuyan does not really have any good beaches, but the resort has a wonderful river swimming spot.
Sibuyan is a remote island and can be really difficult to get to. Traveling there is not suitable for rolling bags, backpacks are a must. When we went there, taking the pump boat from Romblon, that boat was broken and a reserve boat could not go all the way because of the waves. We got dumped on an extremely remote beach, wading to get ashore. If Edgar had not figured out that this was going on, we would have been stuck. That in itself may not be a big deal but after a long trip on buses and boats an issue like this can be quite painful. The best way to get to/from Sibuyan is by the big boat from Batangas that arrives to Romblon or the once a week big boat going all the way to Cajidiocan. Of those two the Cadijidocan-Batangas route is the best.
Remember that Sibuyan has a big volcano that attracts rain and so rainy season does not end for sure until February. December weather varies wildly.

I love this hotel. It is the best place we stayed in during our travels in the Philippines. Spotlessly clean rooms and bathrooms. Divine garden to explore and stroll around. A natural swimming hole big enough for a good swim and deep enough to jump in. Great value restaurant with plenty of choice. Wonderful and great value in-room massages. Super friendly and helpful staff. I can't recommend Sanctuary Garden highly enough. It's lovingly looked after and the owners and staff have got it all so right. Everything a traveller could possibly want for a retreat on Sibuyan Island.

We stayed here recently for 3 nights in our own cottage room with fan for 600 pesos a night. Absolutely awesome room with marble bathroom and we'll worth the money. We met so many people in Romblon who recommended this place to us and it was definitely worth it. We also met Edgar (the partner/owner) in Romblon and unbeknownst to us, he actually organised a tricycle to pick us up from the port when our boat arrived in Sibuyan from Romblon.
The resort is truly beautiful and has a river very close by that was clean and we swam in a couple of times. We also hired bicycles from the resort one day to ride the 8km to Lambingan falls. It was great to ride through the many small villages on the way to the falls although the roads is not paved all the way, enough said...
The food was good and reasonably priced and I must recommend the halo halo.
There is not a lot to do in Magdiwang as it is just a small town and we did not opt to go hiking up the mountain or Mt Guiting Guiting national park.