They were never great.
They lied to their customers by selling hardware under the same name as previously produced hardware with cheaper components and lesser specs.
They built hardware that was simply off-spec, an example being drives where the connectors were an entire millimeter shifted, such that when installed in certain machines the connectors literally could not make contact with the corresponding metal.
They built drives with extreme speeds while entirely sacrificing longevity and reliability.
At best they had a great marketing department that made it possible for them to peddle their crap to the public for so long.
I'm glad to see them go.
Edit:
For those who must have numbers, return statistics:
http://translate.googleusercontent.com/translate_c?depth=2&h...