Visitor ID has been used for years now by our organization, it's easy to use with great support from their team members as well! Nothing at this time but I think they are doing just fine so far!! We have had no issues using them since we started working together back about 4 or 5 year ago (can't remember exactly).
They offer many different types security badges such us RFID cards etc., which makes life easier when you need something specific like an employee badge instead if having multiple versions available all over your office space.