I've had it about a year and keep it as my landline.
Never had any spyware issues my scans come back clean. It you don't have a fast enough internet connection you will get a lot of static.
Best $19.95 i've ever spent. Have made 1000's of hours of international phone calls with it and always works great. Although occasionally you have to restart the device. And for 60 bucks you can get 5 years of unlimited calling.
Have had it for almost 4 years and am happy with it. no spyware problems with it. Do have to restart it sometimes(unplug wait 2 seconds plug it back in) no big deal. It is my land line. Just renewed for 5 more years for $49.95. $10 bucks a year. It's good for conference calls and no dropped calls like you get with a cell phone.