Bests & Worsts Reviews from Amazon

I have been using this brand of filters for awhile, and have been very happy with the results. Recently I purchased the Bluetooth 1900 filters hoping that the technology would help me stretch out the life of my filters and prevent me from replacing them to early. I have been severely disappointed. I installed the filters on 01/01/19. Unexpectedly I had to have a major construction project done in my house where ebony stained oak stair treads were completely sanded down. This project happened on 01/02/2019. As you can guess, my filters are almost entirely clogged with black saw dust from the stain being sanded down. This is what would be expected and I am happy the filters captured the particulate matter. However, the Bluetooth sensor is saying the filters are still at 99% life remaining when I can visibly see that they are clogged. For this reason I am really disappointed and untrusting of the blue tooth technology. I don’t think it is accurately collecting data and would not spend the extra money on these filters again. ( I have made sure that my Bluetooth connection to the app is working properly). I first laughed at the the thought of smart filters, but decided to give it a chance. Wish I had not as this is really just a novelty that has not worked.