I like how easy it was for me as an office manager (or anyone else)to set up each lobby or area we had in our building with my profile information (email address).
It also helped us send out reminders when someone entered one of those areas even if they did not have authorization through another program such as Active Directory at work! Nothing really. The email notifications are great but sometimes you would get multiple emails per day saying people were already there so maybe make them shorter? We used this product at two different offices where most employees worked from home and came into the buildings occasionally just to pick something up. This allowed everyone who needed to come inside during certain times without having to wait in line outside after coming off of public transportation.