After embarrassing predecessor "MUD" the reference for motocross Games was indeed still "MX vs ATV Reflex" or "MX vs ATV Alive". These two are still very good (especially what concerns the control lots of light even a bit better than MX GP).
MXGP now includes 14 current MX Grand Prix circuit (eg Teutschenthal, Maggiora, Valkensvaard) and the current and MX2 MXGP drivers and teams. Both the graphical implementation of the tracks and bikes as well as the gameplay is really good. By 3 different levels (basic, medium, Pro) everyone can choose the suitable for him both in career mode and in online races.
I would be delighted if Milestone brings out longer distances (eg Gaildorf, Loket) and would spend immediately a few euros for this as DLC.