Summary: These units were purchased under the following criteria: Corporate Setting Wireless Headset w/ Mic Name brand USB connectivity Low Cost Comfort Use Case: Unified Communications (Microsoft Lync) These headphones are delivering on all points.
Pros: Feature Rich Cordless Decent Quality More comfortable than H600 at the same price
Summary: I have used it most everyday for over 3 years. Well worth it. I highly recommend this product. Logitech I have found makes very good products.
Pros: This headset is light and fits around the back of your head. Very good sound for a gaming headset and no cord to get caught. Mutes by swiveling the microphone to the rear. Battery life 6 plus hours and can be charged while using.
Cons: After several years of use the headset cracked in the center. Still works, had to fix with a little super glue.
Summary: Music, games sound great and the mic works as intended. I usually get 5-6+ hours of heavy use out of them before they require charging. I'm very particular about the fit of my headsets, and Logitech seems to be the only company who produces models that fit my head.
Pros: Great sound quality, near-perfect fit, solid range, good battery life, form/function are great.
Cons: Build quality is lacking (Like most Logitech products they'll break in no time if you aren't careful). Sometimes the mic goes "robotic" but not often. USB dongle is a bit awkward but not too bad.
Summary: expect to have to reinforce the flimsy neck piece. other then that, these are great headphones. Gave 4 stars even though I had to reinforce back part because every wireless headphones I have ever bought regardless of manufacturer has had weak points.
Pros: Light, comfortable, sounds good. Mic mutes when you lift up the microphone. You can charge them while you are using them.
Cons: Back part is flimsy. Mine broke early on, but a little clay epoxy reinforcing the back part made them 100% usable.
Summary: I would recommend this headset to anyone. However, if your system will accommodate traditional "headsets," not "earsets," then I'd choose them. So far, Windows users seem to have lucked out when it comes to full headphone-style bluetooth with microphone.
Pros: Excellent reception, excellent transmission
Cons: All headsets of this type are extremely uncomfortable.