MultiWan Loadbalancing

[T-Rex]

All;

I am setting up a test bed and have done some testing.  I am wondering what other people are seeing with Multi-Wan performance.

I have a Comcast business Internet for my primary internet with 4 static IP addresses (IP's don't matter for this). My secondary is a T-Mobile 5G connection. Currently with my Sophos UTM I am seeing decent load balancing but I do not like the limited IP licensing of 50IP addresses so I am trying to replace it with OpnSense and hopefully maintain or improve performance with Opnsense I am currently able to get higher than my one provider download meaning I am seeing a multithreaded test my Comcast is 250GB down with 25 up I get that consistently. With T-Mobile plugged in and loadbalanced I can get 500 or so down with 60~80 up which means it is combining the 2 ISP's.

What are some of the Dual Wan performance bandwidth are people in the forum seeing and with what type of equipment?

My equipment is the following:
Dell Optio plex 7050 16GB Ram
Intel 4port 1GB nic
Intel 10GB SFP nic
SSD 120GB drive
Network switch is a Cisco 3560X with 10GB modules
the 10GB has 4 VLAN's configured for local access.

[tong2x]

it works fine, but as expected NOT Double the bandwidth

I have 2 fiber internet from different ISP, both 500mbps