Amateur operation.
Initially switched my number (I was transferring mine) with another subscriber. Took four days to get straightened out - it was an easy fix once the right person got on it.
Call quality was iffy - lots of feedback/echo. Too often no service as all for unknown reasons. Eventually I had no service at all and couldn't get a decent response. I finally just gave up on them.
When I went to cancel, their phone system kept dropping my call so I couldn't speak with anyone in billing. I figured they had perhaps gone out of business because they quit charging my credit card. I did finally get a hold of them after they charged my card for the previous four months. The rep did cancel my service and give me a credit back to the time I had quit using them.
Their customer service people were nice but not always on top of their game. Otherwise, I found the operation to be amateurish and I doubt they'll be a player in this growing field.
Me, I gave up on VOIP altogether. Good luck to those that try it.