HORRIBLE! Purchased 4 black "majic" mugs where you put something hot in and the picture is revealed. Printerpix only sent 1 mug instead of 4, and the one that I received was faulty (you could see the picture when it was supposed to be solid until heat is applied). I emailed and called them multiple times. HORRIBLE CUSTOMER SERVICE! They refused to correct the faulty mug and then wanted $24 more dollars to ship the 3 mugs that they forgot to ship in the first place. WHAT A JOKE!