We have been using the UniFi line of Ubiquiti products for the past few years, we moved over when Cloudtrax was purchased and closed the free cloud service offering.

I have used this solution for four years.

I've been using this solution for about five years. 

More than ten years.

I have been fully engaged with UniFi for the past year, although I have been working with it for almost two years.

I have been using Ubiquiti UniFi for the past two years.

I've been using the solution for seven or eight years. Before I worked at my current company I was using it at my home and for some customers. I started using it originally around 2014 or 2015.