Useful information, and then informed comments about it. The comments might inform me that what looks to me like a good idea has pitfalls; they might propose si

Useful information, and then informed comments about it. The comments might inform me that what looks to me like a good idea has pitfalls; they might propose similar products with advantages or better suited to my need; or they might articulate a position, held by a large group, that I hadn't considered.