Health Expert Oxygen Concentrator Portable Oxygen Therapy Machine for Home Use with Complete Accessories

I had high hopes for this machine.Pros: It is spiffy looking, easy to use, and semi-portable. I think the oxygen output was ok.Cons: It seemed to be emitting some kind of toxic fumes which made me ill. I only used it for 5 hours, and a week later I am still trying to shake off the symptoms it caused.I am writing this review in hopes of warning someone else not to buy this product.