I am currently doing it and this is my third semester. From my experience, I would say that it is not difficult to get WILP M-Tech degree. There is very less probability that you would fail. with some efforts, you can pass. Since this is completely online course except for exams that you have to write at some center (Noida, Bangalore etc), there are around 1K student in a batch. Marking is relative so you will find all kind of students who are scoring too high and too low. and in relative grading, there are very less chance that you would fail.
And moreover, except for first semester you can customize the course i.e. you can choose subject of your choice. Hence it is up to you how much you want to make it difficult but in general they divide subject in such slots that it will not be too hectic and of-course rest is your choice.
I think this course is beneficial if and only if you want to learn. you have to spend time on studies otherwise this is like a normal B-Tech where you pass in one/two night studies.