This site is different than most - we're an opinion based site. This topic is the reason 'shopping recommendations' were banned on Stack Overflow. If we don't want to become a spam center, I think we should have some fairly strict quality guidelines.
Software Recommendations seems to be doing fairly well. Do we want to shamelessly steal its quality requirements? See their guidelines for questions and answers.
The rules there are that a question must contain "enough information", and answers must have personal experience with the product and detail how it matches each requirement in the question.
Is this what we want?
If so, how ruthless should we be in deleting low-quality answers? On SR, I delete them on sight, with a comment inviting the owner to review the guidelines and post another answer. Is that what we want for this site?