Good replacements for the real Philips Sonicare Refills
In operation, I can't tell the difference between these and the official ones. Only reason I didn't give them a 5* is because they don't fit snugly on the brush base. They slide on but not all the way. This doesn't adversely affect how it works, but it would be a bit more professional if they slid on all the way and clicked into place. I will buy again. The $ savings is definitely worth it. Every other aspect of the quality is great.