We stayed at Guillermo's place the last day in our 3-week stay in Belize. We stayed in much more rural areas with more access to exploration and activities, and this was a simple way to end the trip. We could easily take a taxi to the airport and find good markets and food to take home with us.
The location was as quiet as a city can be as it isn't on a main road and about a 20-25 minute walk to town center. It's also close to the sea so you can take the long way into town and enjoy the views.
Guillermo was extremely friendly, great at giving directions, and a good conversationalist. He also makes a delicious breakfast. I'd definitely recommend as a way to start or end a trip in the country!