Late to the party for this question, but...
You see this kind of question a lot on forums, but the answers are not really very useful because anecdotal evidence tends to be too.... anecdotal. I will try to give a thorough answer but it will be lengthy, so I will break it up into two parts:
Part 1:
I've had experience with 7 Razer peripherals, and 5 of them have had some sort of problem.
1. Ferox - got these portable speakers when they 1st came out, and they had a terrible hiss when being charged. The customer service story was that some systems or laptops may have poor ground connections which causes the problem, but for me the hiss occurred in any system I plugged them in to. Didn't return them anyway because I did not like their tinny sound and poor base.
2. Megalodon - I've had these usb based headphones for a long time and they have always worked fine. In some situations I have had to go into the properties of whatever program I'm using, like Skype, and manually select them as they did not switch when they were plugged in. So maybe the drivers could be a bit better, but no real issues.
3. Nostromo - I never used this gamepad much because I didn't really like the feel and layout of the buttons. So I can't really comment on the quality or reliability of it.
4. Imperator - Two friends of mine got imperators, but one of them would randomly freeze up for about 2 seconds during games on his system. They swapped mice and confirmed that the problem did not follow the mouse but stayed with the system. My friend's system was an off the shelf Dell gaming desktop with no modifications. Razer customer service was not really helpful. They gladly sent my friend a new mouse, but as expected it also would randomly freeze. I wound up with the mouse, and I can see it pause for the briefest of moments, not 2 seconds, so it isn't a serious problem for me, but there is something up with this mouse. I can't really use it anyway since it does not work on either of my two mouse pads.
5. Naga (1st generation) - I really liked this mouse. Some of the num pad buttons were a little hard to press reliably, and the lighting was not uniform, but this was not serious. However, after about a year and a half, the mouse would randomly stop responding for as much as 30 seconds when a new program would start up. This was very frustrating, but the newest Naga had come out with an improved number pad so I got that instead of debugging the old one.
6. Naga (2014) - I really like the new number pad ergonomics and the tact switches. Huge improvement. However, it does have one annoying problem so far. In a lot of games you right click to steer the player or pan the camera view. Sometimes when I right click, the cursor randomly jumps up, or left or right 90 degrees or so, which is very disorienting in the game. If I were a more serious gamer, this would be unacceptable. I have not decided if I should return this or not yet.
7. Blackwidow Ultimate - the problem with this mechanical keyboard is that numloc will randomly turn itself off. Since I use the Naga as a num pad, I will be in the middle of a fight and suddenly the actions I've bound to the num pad stop working until I notice that numloc is off. I'm kind of luke warm to the keyboard anyway. The clickiness of the Cherry switches is nice, but there are other sounds: key rattle, key scrape, and a harsh echo sound as a key bottoms out that I do not like.
Facebook
Twitter
Instagram