Before purchasing a product, especially electronics, I read Amazon and technical reviews, review the manufacturer's documentation, and determine if the product will satisfy my needs.
A cursory glance at Amazon reviews of the Logitech USB microphone immediately discloses that 21% are less than favorable (1-3 star rating) - a significant number - which, prudence dictates, should be considered. The following accomplishes that end and is presented in no particular order and assumes a properly functioning microphone, i.e., it is not defective. I run Windows 7 Pro SP1 x64 in a custom machine.
1. Driver conflicts or faulty drivers. The Logitech USB microphone DOES NOT install any drivers, i.e., it relies on existing, native OS USB drivers. As a consequence, any lack of functionality, related to drivers, issues from one's configuration, which includes installed software.
2. Does not work with one's OS. As in number 1, above, this is always an issue which has its source within one's configuration, installed software, or conflicts therewith. By design, the Logitech USB microphone is simply a USB PNP device that handshakes with and operates via one's OS. On its site, Logitech lists the OSs and versions with which the microphone is compatible.
3. Have to have the microphone very close to one's mouth. This is always a function of one's sound configuration, either that found within Windows and integrated audio or related to one's sound card. This is especially true with Windows 7 whose default sound setup does not produce the best results with the USB microphone. There are ample discussions and suggested configurations of USB/sound setup on the Net related to various Windows and Linux versions pertaining to noise cancelling USB microphones.
4. Insufficient or no noise cancelling. This could be related to any number of configuration settings. In my system, if I record while music is playing through my speakers, the music is barely audible while my voice is loud and clear. Such being the case, one can imagine that I do not pick up case-fan noise or nearby TV, radio, or voice conversations.
5. Poor sound quality; not good for lectures, singing, music, or game playing. I, again, have to suggest that this is a function of one's sound configuration. I had to make numerous changes in my default sound setup to achieve what I consider excellent results. To satisfy my curiosity, I conducted a "lecture," in a normal tone of voice, at 20, 15, 10, and 5 feet and, in each case, my lecture was loud and clear. Similarly, I sang a few bars of my favorite tune and I must report that the microphone recorded my dreadful voice faithfully. When playing games, when I am silent, the game sounds/music are loud and clear; when I speak the game sounds are muted (cancelled) and my voice is loud and clear.
6. Poor construction; breaks. My microphone sits on my desk in back of my keyboard. I imagine that, unless I abuse it, it cannot break. Therefore, I guess the question is how much abuse can this microphone take? Since I have no plans to abuse it, I cannot answer the question.
7. Has to be close to the mouth to record. As noted in number 5, above, I am able to record at a distance of 20 feet (presumably greater if I spoke more loudly). As it normally sits on my desk, it is approximately 18 inches from my face and my voice recordings come across 5-by-5.
The following is a summation of other reported negatives.
Records only in 60 second snippets (not microphone related); records when off (impossible - it's off); does not compare with professional microphone (really!); does not work with ABC software (software issue); too much of a pain to set up in Windows (OMG!!); no installation instructions (plug it in USB slot then configure sound setup according to OS/audio card); Windows and this microphone, like MS Word insisting on caps for the first word in a line are an annoyance (choose one: laugh or cry); while on, if one fiddles with the mute button or otherwise uses the microphone as a drum set, it records the sounds produced there from - a design defect (do I really want to comment . . . naw).
I believe that I have shown that the overwhelming majority of the negatives have nothing to do with the Logitech USB microphone under consideration; a scant few might be related to a defective product out of the box. Therefore, even though they constitute 21% of the reviews, worthy of consideration because of their number, I suggest they need not be considered further. I find that the Logitech USB microphone is well made, will survive any non-abusive handling and, when used in a properly configured system, will more than adequately serve all but the most demanding "professional" needs.
Ed