I think about it in terms of buyers, not in terms of forum goers and other reviewers. I know the ratings and comments are more likely to come from other reviewers, but it's the buyers who actually are going to use the information to decide where to spend their sex toy budget.

Obviously some things you can't really cover. If it's your first toy of a particular type, say your first glass or first rabbit, then you aren't really going to be able to describe what an experienced user of that toy might think. If you don't do anal, you aren't going to be able to describe how that dildo feels in your butt. But as long as you disclose what your experience is, then you give the reader of the review the information to decide for themselves.