It works if you have consistent foot traffic and people actually want to use your WiFi. The system I put in my coffee shop has been running for about eight months now and captures maybe 60% of customers who come in. Once they connect you can send them promotions or loyalty rewards which brings some people back. Looking at reviews on a website like this showed me which platforms were worth the monthly cost versus ones that promise too much. Setup requires a decent router and some basic configuration but most services walk you through it. Costs vary based on how many customers you're tracking each month. Best for businesses where people sit and stay a while rather than quick in-and-out places where nobody bothers connecting to WiFi anyway