While the last time I used Rony he didn't require a deposit, like others stated, I would book him in a heartbeat and suggest him to others.
I travel as a solo cruiser and often many guides will charge a higher amount for just one person. Rony didn't. I also got to to a tour on how I wanted. Sightseeing, shopping (including local supermarket for coffee), some beach time and viewing places for staying there for a week. Highlight was lunch at a local place in a regular place that don't get tourist.
The only reason I don't suggest Rony is when I know friends and family have limitations which make meeting the local tour guides outside the cruise area hard on them. Otherwise, first name out of my mouth for the island