We phoned Robert and left a message for him to provide us with a quote. He quickly came to our house and gave us an estimate in writing. This estimate was within our budget and seemed like a reasonable price. We went with Northstar because we assumed he was experienced in older homes (our is 80 years + old). The crew showed up within a reasonable timeframe. We were never given any written material from Northstar, no warranty materials and continually called to have them sent to us. We were promised that they were "in the mail" many times over. To date (one year later), we still do not have anything in our possession. There was also a very integral piece of equipment missing to our attic unit. It was the drip tray for condensation. We called and told Robert that this was missing. He said he would have it installed. We still do not have a drip tray and have used a Rubbermaid container. In the meantime we experienced a ceiling caving in completely in our bedroom due to water buildup in attic in the insulation. Plaster was all over our bedroom. Robert arranged for someone to come and completely replace our ceiling, but to this day, the gentelman has not been able to reach Robert for payment!...Robert ensured us that he would take care of this...We have left messages as recently as a month ago to let Robert know that we are very unhappy with this whole process. We would not recommend using Northstar to anyone - very, very poor customer service and no follow up.