How important is my personal experience when I recommend a product?

In the answers I've posted so far, my experience ranges from “I've never used this application before but I'm familiar enough with the domain to know that it's good for this scenario” to “I've been using this application in depth for the best of two decades for this exact scenario among others”.

Does it, in the end, affect the quality of the answer? Should I systematically mention the depth of my experience in my answer? Or should I only mention it when I think it matters (e.g. to assert some more subjective requirements such as ease of use)?