flashcider, the goal is to keep the record from resonating and slipping on the platter. A record weight will stop the record from slipping but the problem with a hard platter surface is that it has a much different mechanical impedance than the record thus it will not keep the record from resonating. You want a mat that has a similar mechanical impedance to vinyl then it will serve to dampen any resonance in the vinyl. The Funk Firm Achromat get high marks for this and I would absolutely consider getting one of these. People love them. If my turntable did not come with an excellent mat I would definitely consider getting one!.