I am using the Proficook PC WKS 1013 more than satisfied. It is super fast, the temperature of 60 to 100 degrees stepwise adjustable, the display shows the temperature progress can be accurately read and canceled if necessary, keep warm function - tea drinkers what more do you want! Value for money is more than balanced here. I'm very happy because I can finally enjoy my green tea brewed with 70 degrees.