A friend actually ran the board but I paid for the software. I coded in Turbo Pascal and enjoyed the file format documentation that came with it and the TPU containing various user interface components that allowed you to write "Door" programs that mimic the BBS UI.
It was also particularly neat that Searchlight supported redirecting BIOS screen writes to remote users, allowing you to use any program that wrote to the screen thru the BIOS as a "Door", with the BBS handling the serial communication.
I had a ton of fun with it in the mid-90s. Then the Internet came along and killed it all off.