Anyone in online graduate engineering program?

I have a BS in ChE and plan to start MS in Materials science (online) this Fall. For those who are currently in the program, how are you liking it? I plan to take 3 courses/year, which will take me about 3 years to get a MS in Materials science. I am not sure if I’ll be able to manage extra workloads as I work full time in semiconductor company in NY.

Thanks,