Excerpt: Love the over the ear fitting. So much more comfortable than the over the head sets I had been using. I was using a Microsoft Life-Chat LX-6000 for Business and it has good quality sound but the over head piece is too large for me - it kept slipping around even though it was on the smallest size. Plantronics Blackwire 435M is good quality hearing except for occasional popping, hissing, and lost connection (which may be due to VOIP).
Excerpt: I'm on my second headset since last week. Both had the same problem on multiple computers (tested on both Mac OS and Windows). There is a low-level hiss in both earbuds, and my voice seems to feedback through the microphone into the earbuds. This issue was not present with my previous Plantronics headset, which is a much older model. Tech support was unable to help me with this issue, and the replacement unit had exactly the same issue.
The Plantronics C435 Ear-Hook Headset is a great product
10 April 2013
Summary: I bought this product to use at my workplace and it was just what I needed. It works just great and I can hear more clearly now. I use to use a different brand name headset and had multiple problems with it. Since I have been using the Plantronics headset I enjoy it very much so and would buy it again to use.
Excerpt: This is the best wired headset all around that I have used for business applications. I use it frequently with my laptop running a Cisco softphone. Excellent quality, comfortable and no configuration needed under Windows 7.