Bad quality -- spend the extra bucks for the non-generic
I bought these because they were cheap ($6.35 for set of 4).  Here's my experience so far:<br /><br />First head:  Used it for 1-2 weeks.  After the first week, the fit was such that it got loose and would come off.  As I was brushing, there were a couple of times when the head came off and I poked my cheek or tongue with the exposed metal of the handle unit.  Not pleasant.<br /><br />Second head:  Used it for &#60;1 week.  The fit was good so I was hoping I wouldn't have the same issue as I had with the first head.  Problem was, after 3-4 uses, I noticed that the spinning head wasn't spinning.  It was on properly but something wasn't right.  It turned into a standard toothbrush at that point so I tossed it.<br /><br />I'm on the third head now.  Hoping I have a better experience, but I'm a bit leery as the fit doesn't seem very good and think I'll buy the brand name heads when they go on sale.
Rating: 2 stars