I have been a Jabra Bluetooth fan for years and this is my first non-Jabra Bluetooth headset. In these years I have broken, lost or damaged at least five Jabra headsets but still was looking for all for one solution.There are three major audio communication devices today which may need a headset. Starting with your deskphone, your cell/mobile phone and may be your software VoIP running on your laptop/desktop specifically when you travel.I am glad to say this device can do all that and that too with ease of use to the limit that factory settings will work for most standard phones.Desk phone/Landline (as we used to call it :-) )I am using Cisco 79xx series VoIP desk phone at work with headset button that has RJ11 jack for headset - piece of cake worked like a charm, no tuning required except minor volume setting.Cell/MobilePaired with my blackberry and iPhone under a minute and up and runningVoIP Softphone: have not tried as yet but have been informed that it should work flawlessly.So far my experience for the last 48 hours have been nothing but *five star*.Sound Quality: Excellent 5* including NO static, noise etcDistance: Pretty good, I can use my breakroom while in the meeting which should be 20+ feet without loss of qualityRemote pickup/drop: I dont have a lifter so I have to press headset button but can drop the call remotely. Cell phone works just fine the way it should including last number redialWeight n Stuff : Very nice fit and light wt however as compared to typical BT series of Jabra it is little big (with extended MIC)Noise Cancellation: Haven't heard a complaint as yet including while driving the car wih driving window openAdditional: I am thinking of buying the 500A base station for my home as well so that I can use the same headset for all my needs - Bonus.Looks: Not bad but this is not the one that will enhance your looks :-). Extended Mic gives you noise cancelling, avoids your effort to speak louder but reduces the glamour case you care but thats my opinion.Now the downside1. Minor: Base station, as typical of Plantronics, too big could have done a better job but not really a downside as in cant take even half a point for that. But something to think about.2. Major downside is unlike Jabra's amazing feature of connecting two bluetooth devices at the same time, 510S system just drops my cell phone and connects to basestation the moment it reaches with in the vicinity of signal - bad bad badI really wish that plantronics can develop the headset to support multiple bluetooth devices simultaneously so that irrespetive what rings you can answer and feel really handsfree.That takes one star away. Case I could find a solution to this problem I will update my review.Hope this info will help you a bit meanwhile "Wish you all the best in search for the perfect headset":-)