Barbara and Bart know everyone in the town, so can arrange Lamanai tours, etc.
The place is a room in a shared household, with breakfast provided. It is about 3k out of town, but bikes are available and usually Bart can give a lift into town. The room has a fan, no air con. There are 3 friendly dogs outside. There is good internet, and a good shower in the bathroom (which is shared between 2 AirBnb rooms - there were no other guests when we were there though).
The place is great value, and as long as nothing above is an issue for you, you will have a great time.
Be careful to follow directions to place carefully - detailed instructions are provided in the instructions but it is easy to go slightly wrong and end up in the next street (which is only about 200 metres away, so no big deal).