Expensive, but how else can you use the device? Not much of an alternative available.
No, I would not recommend this to a friend.
Response from waterpik.comBy Waterpik Product Support, March 12, 2024
Hello elizabethg - Thank you for your feedback. We're sorry you are not completely satisfied. We do offer a subscription service for the replacements that might help. Here is a link to the brush heads, just click on the Delivery Frequency drop down for more information. https://store.waterpik.com/white-with-chrome-waterpikr-sonic-fusion-replacement-flossing-brush-heads-sfrb-2ew