It has been quite easy to use to track all my employees for their visas, EADs etc. We have had excellent customer service from this product by Trackers team during our entire experience with them. Not much dislike about anything that we thought or experienced while using tracker. There could be some minor improvements in features but nothing major as far as i can see. Using it since last 3 years and never faced any issues so far. I would say its very good tool to manage your employee visa details easily without having other third party services that are expensive. Tracking of Employee Visa status, tracking of H1B transfers etc.