Soft Guarantee

I was in my suit shop the other day getting measured for some shirts and I mentioned that I used magnetic stays in the collars to make them stand up a bit without a tie.  As she measured, my favorite customer helper asked, “How do you like them?” I was happy with them. She said, “Here is an alternative with a hidden button that does just the same thing. Want to try it on a shirt or two? And if you don’t like it, we can just switch out the collars.” Now, how do I say ‘no’ to that? It was an inevitable sale since either way I’d be OK. Then I remembered all the times in the past she’d ‘suggested’ …and I never had to bring anything back to switch out! When you suggest to your clients, do you also provide a soft guarantee such as this? (This can even work with your children!)