The ease of use, ability for multiple users with different roles (guard at door/front desk etc) so everyone knows what they need access too when entering an area which makes life easier! Some areas have been upgraded since we started using this system but it's not as good now compared to back then - mainly because there aren't many features left that were available previously. I would recommend if you're looking into getting gate sentries installed look elsewhere first however; their website has some great offers currently including free installations for new customers who sign up during certain times each month. We needed something secure yet easy-to-use to monitor our building entrances from anywhere by staff members within my organisation without having them physically present around visitors' doors all day long. This software does exactly how its described above therefore no other benefits mentioned here could be achieved otherwise.