I bought a Vonage voIP line 4 years ago for the same reason as yours. I have that 500 minutes plan. No complaints whatsoever . Of course, remember that the phone will be as reliable as your current internet connection.

Now, regarding 911, you can set your 911 physical address on their website. I've never done a 911 call from that line, or any other line for that matter... knock on wood, so I have no idea if my address gets reflected correctly on the 911 system.

The sailor does not pray for wind, he learns to sail. --Lindborg