Hidden Haven is a great treat in the jungle. It's now a family affair with Elaine/Dave running the property and Jack running food/beverage/poolside. Make sure to have a meal w/ Jack, breakfasts are great value and a great way to start the day. In the evening you won't find better prices on cold Belikin anywhere while hanging out by the pool. The cabanas have great privacy and space as well as good amenities. If you want a home base for jungle excursions, Hidden Haven is a great spot.
We had a car to get around and I highly recommend that. It's worth having for daily excursions (caves/ruins/etc), but also the freedom to check out the local Belize culture from the markets in Belmopan to Mennonite Spanish Lookout.