I've had the Bilt Explorer helmet for about 5 months now. I picked it up for the $99 price the OP paid. I travel a lot and wanted a helmet I could take with me and not worry about being broken or stolen, cheap to replace.
I wear a Medium and the one problem I had with it were the cheek pieces mashed my face too much. So my simple solution was to pull the cheeks out, cut the stitching, and pulled some of the padding out, then stitched it back up, it fits prefect now.