The main strength of this paper is the sheer volume of the clinical material—almost 1300 MEG studies in 1000 consecutive patients evaluated as part of the workup for possible epilepsy surgery. A recent meta-analysis7 found 23 papers that associated MEG spiking to surgical resection site and then to surgical outcome. The total N was 440 in those 23 studies. When one notes that 405 patients underwent epilepsy surgery in Rampp et al, the contribution to the literature is immediately obvious. Adding to this, the longitudinal duration of this study spanning 28 years and a trial conducted at one of the oldest and most established MEG centers in Europe, and you have an impressive collection of carefully acquired data. If there were any doubts regarding the amount of available scientific data on MEG as a diagnostic tool for epilepsy, this study should dispel those concerns.