It is difficult to give a rating when I believe our review is based on two different aspects. Firstly, the customer service we received from Andy in Nelson was great. We had many issues with the set up of the solar due to different factors, however he was patient and persevered until solutions were found, responding quickly and checking in regularly. Unfortunately one of the issues we have had with the solar, is the actual lack of savings we have made, even though we have a ralatively powerful set-up on our roof. Had we realised that the savings would be as minimal as they are during the winter months, we would have thought twice about it. We are still hoping for signifiicant improvement in Summer. Because of the ongoing issues we were having, we were encouraged to seek a second opinion from another solar provider. We were incredibly disappointed to discover we paid $4000 more for our solar than what another company were offering for the exact same product. Politely put, we paid for a brand. In saying that, it has been a steep learning curve for us, a reminder of how important it is to get more than one quote. Regarding the ventilation system we had installed, we could not be happier. Our home is warmer, dryer, has eliminated all window condensation, and generally feels fresher.