Digital Systems Design

Both instructors are really great.

All instructors are great but I recommend Mr. Ali

 I think as long as you put the required effort into 321, both Chehab and Mansour are great. The advantage with Chehab is that there's no VHDL project (at least there wasn't last year) which in my opinion is a huge plus. The load with him is very light, you basically just focus on the exams, and there's around 4-5 easy assignments throughout the term.

Chehab is really good but the exams of Chehab and Mansour will be common and if you want to compare who explains better, I'd go for Mansour. But most people would tell you go for Chehab, if that's what you're asking for.