I've had this for a couple of weeks now, it has performed flawlessly. I did a lot of research, this one fits my needs best.
I use skype-in and forward my cell phone to it because at home my cell phone coverage is spotty at the house. Skype out calls have been as good as regular phone service. I've been told when using the PC skype headset calls sounds better than the phone but the sound is still ok, I have a very good headset it should sound better. You can set it to skype out always, landline always with an option to choose or have it ask for prior to calling, so you can choose which is best for you. I have it set to skypeout always, I haven't figured out how to get the caller ID other than Skype's 000-012-3456, so people you call may be a little curious why such a unusual Caller ID.
Netgear has many options for configuring it to for your network, if you have a tricky network setup this is your phone. For me pluging the base unit in the router did the entire setup in minutes. The instructions where a little on the lite side you should go to Netgear website and download the latest manuals you can configure the phone on your network from web page, configuring the phone from the on-screen menu was straight forward enough. I do like the screen it's similar to most cell phones today. The screen and buttons light up when you start dialing.
I installed the base unit next to router, and charging base at my desk, the range in the house is great, outside I get about 150ft before it starts breaking up.
The speaker phone works well, people will know on the other end they are on speaker. It has a headset jack, I've not used it yet. The batteries are rechargeable Nickel Metal Hydride AAA 750mAh, so you could purchase rechargeable AAA NiHm batteries when needed quite easily. I tend to leave it in the charger when not in use so I'm not sure how long the batteries will last, I'd assume a couple days easy.
The construction is of a light plastic, so it feels light in your hand, it's not a heavy solid phone.
I like the DECT using a frequency other than my wireless internet. Overall no complaints, it's not cheap, does everything asked of it.