The Ooma system was purchased to replace my exisiting VoIP service provide primarally due to the unsolicited call filtering. After uploading the contacts from our mobile number and setting the incomming caller to only allow calls from number in contact list, the number of unsolicited call has gone to zero. The Ooma dashboard has a setting to send all calls from numbers not in my contact list to Voice Mail eliminiates 90% of the marketing calls.
This is much better than individually marking the caller as a Black List which is very time consuming since number rarely repeat.
It works like a regular phone, it offers a variety of different options, that can be accessed online. The website is very well organized and instructions are easy to follow, just choose what you desire. I had a good experience with this device so far, hope not to get disappointed in the future either.