My memory for these things is terrible, but I believe the Bias was replaced with the Bias 2 about 5 years ago or so. These cartridges have great bass weight and scale, are very good at minimising surface noise but related to that they're not the most open sounding either. I suspect the latter is the cause of any bad reviews, but it is a very easy cartridge to live with, which is something most reviewers do not get time to appreciate.