I did 2 solo hikes with the company and got lots of amazing and invaluable information about the island, nature, local vegetation and life. My first hike was to Faial da Terra and a lovely waterfall, followed by a delicious lunch at one of the cute seafood restaurants. Another was Lagoa do Fogo - one of the best hikes on the island. However, since I am a blogger and photographer, I was also interested in checking out local villages, a liqueur store, a town nearby, etc., and the owner's son was beyond accommodating and helpful.
You won't find friendlier people than those running BigBlue Adventures. HIGHLY RECOMMENDED!