Customers were confused about a product so I took some time to talk with them about that, explain the differences with other products, and I'm a little surprised that they bought it because I also spent a lot of time on what's wrong with it and how there are faster/easier/better ways to do the alternative uses they were thinking of.

It's a case of, for the price I'm selling it, it's fine for the niche it's designed for, but you may already own other things that work better.