For what it's worth, some comments from an infrequent user (once a month?)
I have not flown much during the Winter so haven't used it much. I needed to use it last weekend and, for my sort of flying, I still find it unnecessarily cumbersome and difficult to use.
E.g. Why do I have to enter the full date and time at least three times each time I want a different briefing for the same day? For much of my flying I do not decide where to go until I see what the weather is like so I might want several route briefings and some aerodrome briefings. I imagine that it is a satisfactory service for those whose flying is more planned and less weather dependent but, for those of us who have to plan around weather on the day, it is infuriating.
To me, such a safety critical facility should be very easy and intuitive to use, just like it used to be. The new system does not give me anything that the old system didn't give me, it is much harder to use, and is therefore LESS SAFE.
I know a few PPL's who have struggled with it and who therefore fly without checking NOTAMs.