NOTE: I have NOT purchased these, HOWEVER I have a pertinent (I believe) observation about these reviews.  My GUESS is there MAY be a recent issue - because older reviews are mostly positive and recent reviews (last couple of months) are mostly negative.  I share this and suggest you look at positive and negative reviews and make the decision yourself.  (I find this helpful w/ any product actually - as sometimes the manufacture may change (or they may source it from someone different  - and the product itself, may improve or devolve).  Cheers, Steve