VERY Difficult. If you fall behind it is all you have little hope. Take advange of all the help you can get and dont leave any questions unanswered.

a unit that doesnt change much year for year, and has good lecturers

Feels like you're thrown in the deep end at the start but if you work hard, really try and understand what's going on and keep on top of the weekly work, you'll come out of it with your problem-solving skills really fine-tuned and feel like you can take on any other unit!

an interesting unit which i can easily understand. i had fun at this unit and achieved HD.

A hard unit but a rewarding unit nonetheless. It requires a high order of thinking and a lot of practice but if you put the effort in, you'll see the rewards. Very good lecturer in Sem 1 helps a lot.

Considered a challenging maths unit for the first year student. More practices are needed to get through this unit.

For a first year unit, MATH1001 can be considered as a difficult unit. Practices are needed in order to make yourself familiar with the questions ask. Do as more practices as you can. You'll not regret for that. Good luck :)