Yes, I've worked with influencers on several occasions, and the results can truly justify the investment, although it depends greatly on the type of influencer you choose. In my experience, micro-influencers tend to generate better engagement than big names because they have more loyal and trustworthy audiences, and their recommendations are perceived as more authentic. Sales aren't always immediate, but in the medium term, the return on investment can be significant if you choose an influencer aligned with your niche and product. On the other hand, influencers with millions of followers can be very expensive and don't always guarantee conversions, although they do provide brand visibility. In short, the key is to analyze the audience and their relationship with the product, rather than the number of followers they have.