I made a thread previously about mouse misclicks. The problem became significantly worse, but that mouse was stupid expensive and I didn't want to buy a new one.
I lucked out at the DAV (Disabled American Veterans) thrift shop, they had a DEATHADDER ELITE for three dollars. New ones go for about $46.
So I load it up and the RGB stuff is REALLY pronounced.
I did a system restore a few months ago, so I didn't have the razer software, and had to redownload.
The funny thing is they made me register the mouse, and that demands that you upload a jpg of your receipt. So I did, I uploaded the picture of the DAV receipt.
AND IT WENT THROUGH!
Once I had the synapse software installed (I'm not a big fan, it's pointlessly cloud based) I was able to dim the RGB, and lock it to one color. (I chose blue)
The mouse is really snappy, and the mousewheel has teeth, like a high grip bike tire.
I'd say if you can pick one up used, go for it. As to Razer products in general? Probably wouldn't recommend them. They've got a rep for lasting about as long as the warranty.