We visited in January and had a really nice experience. For $12 we thought it was a good way to spend an hour.
The boat's skipper was quiet over the microphone and I couldn't hear much of what he said. But it didn't really matter as I'd never heard of the people he mentioned so it meant nothing to me anyway! I was quite happy just sitting there enjoying the scenery and sunshine.
It was a nice hour spent in a small boat, in beautiful sunshine admiring houses belonging to wealthy people we'd never heard of being from the UK.
Only one criticism - the restroom was less than clean!!