We stayed there with 4 kids (ages 9,8,6 and 4).
Good:
The place is Huge! Great bedroom and bathroom space. Kitchen is fine and TV area is good for the kids. Pool was good (size and temperature). It's SOO hot in Nosara so in the afternoons it was great to have a place to swim (and there was some shade in the late afternoon). It is walking distance to everything (beach, shops, restaurants). We had young kids so renting a golf cart would be ideal, as we were averaging 20-30k steps a day (and again, it is super hot outside).
Tyler seems like a great guy and and answered all my questions over email quite quickly. The property manager was available anytime as well and was very pleasant as well.
Air conditioning was good in the bedrooms.
A cleaner came every 3 days, which was nice as the place gets covered in sand.
Not so great:
-Internet connection was not good. We found the best internet connection at Cafe Paris.
-The place is dated and could benefit from some fresh decor (some white paint, fresh curtains, get rid of all the knickknacks, old paintings and the dark wood tables/dark couches, maybe even paint the kitchen?!).
-It felt quite dark inside and there are bars on all the windows, so it also felt a bit confining when you are inside. I'm only saying this because I think the place could be amazing if it was freshened up with some new/modern decor inside and some nicer outdoor pool/patio furniture.
-Laundry was a bit of a process so we only did it once.
Final note: There are a lot of modern places popping up in Nosara. This place has the size, the bones and the location to be a great place, it just needs some updating.