Ivan’s work quality, professionalism, responsiveness: 6 stars. Cost: 50% lower than competitors. Pre-contract research: Ivan was the one consummate pro. His work quality exceeded all expectations. (n.b., other providers use high-pressure cleaning that can damage gutters and drains and blow harmful algae and mold onto plants, outdoor furniture, etc.) Our roof and walls are clean, and our 30-year-old home and once-algae/mold-covered roof look new.