I've not used any other tools to connect to any other virtual machines. I cannot compare it with another tool.

I use Fortinet VPN and it is better compared to  Citrix Gateway's VPN.

I used the Cisco VPN a long time ago.

We used Barracuda. We switched from Barracuda because Citrix offered better features and scalability.

We normally try to evaluate other options depending on the customers use case and objectives, but somehow we end up sticking with Citrix ADC since with we've started working with it.

We did not use a previous solution.

We were using F5 LTM (Local Traffic Manager) before. They are the market leader. We were using that, but we replaced it with the NetScaler.