Vantaggi
Initially I was under the impression that they were a promising venture. This was initially due to a recommendation of a former cooworker of mine, and then furthered by HST principals only real skills: deception, and manipulation.
Svantaggi
The negatives are too many too mention. When the veil is dropped, it becomes clear that every word and every action is based in the gross incompetence of the two principals. Both spend their days managing the appearence of their startup (now at year 8+ of incubationary angel funding, at least its 4th wave of staffing, and umpteenth mission statement redirection ) by inflating a facade with the vapor of so much steaming excrement. During my association with the pair, the direction changed on a monthly basis, the two were never in sync on what the mission was. I tested this to confirm. Long and short, while the two can talk a game, they are effectively clueless on even the basics of solar energy science and technology.