Compatible with my PC, I felt a discreet improvement of its functioning. Commissioned on November 2 and November 8 received that with a Premium subscription (where we logically receives the next day) on and paid without me being informed clearly at the end of the one-month trial offer ... I said that the order was carried out one morning on time at a premium order. The delay was therefore unjustified. I am very unhappy with the Premium subscription. I'll request a refund.