I had an older SoundStation 2 (w/o the display) that had served me superbly for many years, but when the mute button started wearing out (had to stab it hard several times to get it to work), I decided to just replace it with a newer unit instead of trying to fix it. As the phone line I need to connect it to is analog, I chose this model. I found I could also connect it to my network (in addition to the analog phone line), as a network connection allowed me to easily adjust some of the phone settings (via a web interface). I like all the enhancements to this phone (over my old SoundStation 2), but I've been told by remote parties that I'm harder to hear than I used to be on my older unit (and I sit with my mouth about 18-24 inches from one of the mics)... I often have to lean in to within 12 inches of the mic before people say it's ok. Considering this is designed for conference rooms, I'm surprised by that. I also found that if anyone else is talking, I can't seem to talk over them... I'm not sure if that is due to an issue with the full-duplexing, or just that the mic is so weak I'm unable to speak over others (or some other issue). That said, I'm still pleased and still feel Polycom's are the best speakerphones I've ever used.

The Polycom SoundStation Duo is an amazing product,
I already knew it before I've purchased as I own 2 more in our business.

I arrived fairly fast, and with all the expected accessories and cables
really pleased with the phone and the seller

Not cheap and sometimes a bit difficult to configure. But it delivers good sound quality and with both POTS and VOIP a future proof investment.

This phone was bought for a not-for-profit's headquarters. Unfortunately, this phone isn't a plug and go (or easily programmable). It's seems to be good quality, but it hasn't worked yet due to lack of IT skills available in our office.

Update: I am upgrading the review of the product as even when just plugging in a mobile phone it works great. The mic in this guy picks up voices perfectly across the 12+ foot boardroom table. The speaker(s?) are also very clear, making it easy for those traveling to call in.

Though not as loud as Panasonic, it is working very well. However, when connected to my phone with an extension cable from a 3rd party, the call quality drops significantly.