We had a great time at Parrot's Nest. It's not extremely close to easy transportation, but they provide great directions to a nearby (very affordable) local taxi to get you into town and/or help you set up tours that pick up on site. As for the location itself, you are right in the beautiful Belizean wilderness with river tubing a very short walk away. We liked it enough to book an extra night.
Side note: the availability to have breakfast and dinner provided on site was a great feature for a more remote location.