The responsiveness from them regarding our system is unsurpassed. - It has been two months since we got our new phone system and although we are still figuring out the different features, the service and support from World Telecom & Surveillance, Inc. is exceptional. Whenever I have a question about a feature, I email the staff and they will either email or call me immediately or even show up on-site. The responsiveness from them regarding our system is unsurpassed. World Telecom & Surveillance, Inc. is a professional and reliable company whose customer service deserves an A+ rating.