We are very confident in the quality and performance of our pinball mods. If for any reason you are not satisfied with your mod, you can return it for a full refund or exchange within 30 days and we will cover your return shipping. After 30 days, we offer a limited lifetime guarantee on all non-motorized mods (i.e. not disco ball/plasma disk). This lifetime guarantee is simple. If your mod fails to perform, at our discretion, we will either repair or replace it free of charge for as long as you own your game, you just pay the return shipping.