the sales people are very helpful, knowledgeable and most of all not pushy. they give you 30 days to try it and if you don't like it you can return it. they also work on their own products. finally found a good American made product at a reasonable price. the air purifier takes out dust and allergens from the air and our family is breathing so much easier. i would highly recommend it to anyone. most of my friends and family have their products and that is how i was referred.