The IQC has been great. I have been a Pax 3 user for the past couple of years until the IQC was recommended to me by a friend so I bought one. The taste coming out of the IQC was superior and it is unbelievably smooth. The IQC operates at another level. I've since purchased 4 of them, sending them to family and friends who want a more healthy alternative. They can now be counted as fans. I give the unit itself, 5 stars. Divinchi customer service, brought the rating down to a 4 star. No one was rude, just non-responsvie. My rating below reflects my post-buying experience. The lack of response from customer service on both a support and return inquiry, was surprising. It does not match the product's performance.