You get a lot of frames without breaking the bank - which is nice.  The quality is so-so -- but it definitely worked for my picture ledge wall (no one can really tell that they are cheap, even when up close -- it's only with handling them that you can tell).  They are packaged poorly, however.  I ordered three sets from the same manufacturer (these and a slightly different configuration).  In every order, there was something broken.  And then I got replacements -- and the same thing happened.  And then I even went through a third round of replacements -- and broken frames / glass again.  Really frustrating, annoying that I had to deal with broken glass, and took over a month with all of the shipments.  

Pros: Great value
Cons: Poor packaging (items arrived broken multiple times), cheap (but can't tell when they are hanging)