2 stars is based on customer service and resolution. The product itself seems to do the job, but the customer service quality represents the compnay. I purchased a BIOMAX 450 unit based on Alex Fergus review. Unfortunately, I was naive and also ordered the remote control and the desk mount arm. The remote control is a waste of money, you can get the same thing from their app. I'm not even sure why this reputable company is putting its good name at risk of getting bad reviews. *DO NOT PURCHASE* the remote. Customer service is ok at responding and getting 1 star for resolution. I've gone back and forth so many times, I will just give up on the control and the money spent on it. I'm on the market for another panel but hesitant to get it from the same company. Others have complained about customer service from PLATINUMLED, well, I should have heeded the warning!