Proximity-wise, it’s half way between the airport and Belize City--15 minutes by car each way.
Activity-wise, there is nothing in walking distance of the property. To go out, you’ll need to either have rented a car, get a taxi, or hire Brady.
We were without a rental car for the first 24 hours of our stay and therefore depended on Brady to take us everywhere. While the convenience of having a personal driver was great, we felt the fare calculations could have been a little more transparent. With little consistency//accuracy in logging mileage, he charged $4 Belize per mile (even though $3 Belize was already agreed upon). It adds up really fast, and to avoid feeling ripped off, we’d recommend just going with a rental car.