I've been using it since 2007.
Very good sound, well-balanced and clear highs...
Until the tweeter diaphragm broke...!
I already changed them several times on this model and on the 502. Many other users had similar problems (read the forum on this product).
It's ok for rehearsals or to play CDs. But don't use them as FOH or monitors during live gigs.
As long as the product is under warranty dealers send you new membranes immediately without even checking if they are really broken... this means they know there's a problem!
I give it a 1.