I'd been with vonage for a couple years. Frankly, the only problems I had with them were equipment-related ones. They "upgraded" my netgear wireless router to a linksys one that included a VOIP router. My old netgear router worked flawlessly. My new linksys one was poor at best, constantly dropping connection speeds until connection became impossible. Unplugging & replugging the router would fix this. Initially, I only had to do this about every day or two. But after a move, it became totally unworkable requiring this shock therapy every hour or two. About that time, Vonage lost its patent infringement case with verizon & their very existence became questionable. At the best, they would come up with some work-around for the verizon patents & I would be their guinea pig. !!!NOT!!! I was tossing both vonage & that useless router. I bought a netgear rangemax wireless router & set out to find another VOIP company.
I decided to go with VYL on the basis of other ratings. They got me set up pretty quickly, the adapter came the next week. The customer service guy suggested I plug the adapter into the cable modem & plug my wireless router into the adapter. However, to my disgust, when I opened the box it was another Linksys piece of equipment. It was tough plugging that THING upstream of my router considering the problems I'd had with Linksys equipment, but I gave it the old college try. When I did this, (of course) NEITHER MY INTERNET NOR MY PHONE WORKED!! But when I ignored customer service, plugged the netgear router into the modem & put the adapter downstream, both my internet & my VOIP phone worked.
Voice quality is fine, even with this arrangement. The only problem I have is that sometimes when I speed dial numbers the connection isn't 100%. Sometimes I have to redial several times to get through. But I'd rather have inconstant outbound dialing with internet that consistently works.
Disconnecting vonage is a story in itself. I'm not used to raising my voice, but it's hard not to when you have said 10 times, "just cancel my account" & they are trying to foist you off on technical support to "help you". It took 45 minutes on the phone over the course of 2 calls to get vonage turned off. I guess they are leaning on customer service to keep the rats from jumping ship. Too bad.