We got several quotes, and all of them had problems: some very expensive, others complained about the attic access, others not timely. Greensavers did a great - and honest - job with their assessment of how to make our house more energy efficient. Then they followed it up with great service when they actually did the job. They put dropsheets over our clothes, vacuumed any dirt, and were very concerned about doing the job right.
Would hire them again.