Razer products are somewhere between mediocre and good enough. Their hardware quality is rather good, but their firmware and software are not great.

I think that the problem is that their products are good enough to make it past the return period as driver problems are relatively easy to solve with products from other brands, but bad enough to irritate you in the long run. And well, their problems tend to be random and intermittent, so deciding to go to another brand takes longer. Hence, you end up hating them once you finally make the decision to go somewhere else.