as good as the oem but easier on the wallet [SEP] after making the purchase of the oral b recommended by my dental hygienist i wanted to try a couple of different brush heads but balked at the cost for the oem versions i decided to try this set of replacement brush heads and am so happy i did the quality of these heads is great look feel like original they fit firmly on the oral b no jiggling and are a fraction of the cost for oem heads win win win i have been using the replacement heads for a couple weeks now alternating between the sensitive clean and cross action and they are holding up as well as the original supplied head has i will definitely purchase another set of these replacement brush heads when the time comes highly recommended