I used their Multimedia toolkit in my development of our own conference application. Since I was new to multimedia arena, I found a hard time at first in understanding some of the requirements I'm required to implement. However, the guys in LEADTOOLS have helped me improve understanding of Multimedia, how it works in general and how their functions fit-in with my understanding. Now the conference application is performing amazingly and we even added a feature for saving to a file with H.264 compression.