Of course, it depends on many things. If I feel I'm close to the product/topic I can be an expert and pay attention to small things, but If I don't have experience with the problem and product I usually just check if the product is useful for me.
Depends on the product, but I would largely put the points into a few basic categories:
- My UI/UX experience with the software / any other product itself
- Any tech issues / errors I got with the product
- Any functions I would suggest be added in the future
It always makes it easier if the maker/hunter mentions in the first comment or product description what feedback they are looking for - e.g. Please comment below on the most useful function you found on the main page (or something like this) --> tells me exactly what to pay attention to, for maker to get the best value from my feedback.