I had a really hard time deciding where to stay in Montezuma. I am very glad we ended up at Amor de Mar for several reasons - the first being it's stunning waterfront, landscaped backyard with lots of hammocks, chairs, and an awesome natural tide pool between the rocks to swim in. My husband and I love natural pools, so we had no problem cannonballing in (it's quite deep and certainly wide enough.. not sure why people are saying it's small.. it is NOT small).
We stayed in room 5, which had an awesome private balcony and AC (Costa Rica can get humid). I would say it's worth the splurge for a second floor balcony room. Make sure you are cozy with your travel partners because the (very cute) bathroom has a curtain instead of a door. The only problem with the room - we could hear our neighbors talking, as if there were merely a curtain between us instead of a wall.
The hotel has an open air restaurant that is blended effortlessly into the design of the hotel. Lots of sea breezes, friendly dogs, fellow travelers lounging about - just a great vibe. One complaint - why don't they serve a free breakfast? I don't get it... but fortunately, Montezuma has plenty of yummy little cafes and restaurants a short stroll from the hotel. Oh, and this place is directly across the street from the waterfalls and a few houses down from the BEST restaurant in town - playa de las artistas (make a reservation and snag one of the tables w/ cushions right by the sand).
Carla was very helpful. We asked her about massages and isla tortuga trips and she had things booked very quickly. She booked a massuse to come to our room, but when the massuse arrived she said she was exhausted and asked if she could give us a shorter massage or reschedule... hmm. I would suggest booking your own massage at one of the local hotels (just walk around town and you will see signs). Also, if you ask about booking a trip to Isla Tortuga, I would recommend going with one of the tour operators that cooks you lunch right on the beach for $45. You might be offered a yacht charter trip for $60 (which we ended up doing) but go with a slightly larger boat that does the beach cookout. The 'yacht' was really small and not what we were expecting. When we got to Isla Tortuga we saw groups eating amazing oyster and fish dinners with beer, etc.. and our lunch was a bowl of luke warm arroz con pollo on the little boat. I might be sounding picky, but once you get there you'll see what I mean!
I would stay here again if we come back to Montezuma, but I'd book activities on my own. Also, there is a fridge in the room so you can bring your own drinks and lounge away on one of the hammocks or your deck. Enjoy!!