Razer has been the least reliable company to me when it comes to PC peripherals. They have the least amount of quality control in their product yet they still charge premium price for their products.
I have owned 4 Razer mice, the longest working time for one was 1 year and about 8 months. I owned 2 deathadders, 1 lachesis and 1 another which i forgot the name.
Lachesis broke within first couple months, it had cursor jumping issues. The most which worked was the original deathadder edition. The other 2 had some kind of problem within 1 year.
Logitech on the other hand is the most reliable. My keyboard Logitech G15 is over 7 years old and still don't have a single broken key, its LCD display is still 100% working.
When my last razer mouse broke i bought Logitech G400 and it has been working fine for the past 4 years and i have been using logitech z906 speakers for years.
Yeah i maybe a logitech fanboy but its their quality that made me love them unlike razer which failed me not once, twice but many times.