If you get THAT clear and believe in some product, go ahead. Your audience trusts your word. But most folks need to use or experience before they can get clear, because they have a fear: the fear of using trust. I am slowly losing that fear but still use what I promote, before I promote it. I also just sell my stuff mainly. Since I have quite a few products and eBooks and services to sell.
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ads will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.