An upside to giving demos is that if your viewer doesn't know you're a dev on the project (thinks you're just a business/sales person), they're a lot more hones

An upside to giving demos is that if your viewer doesn't know you're a dev on the project (thinks you're just a business/sales person), they're a lot more honest with feedback. I've learned to never position myself as the guy who knows everything about the product...they're less afraid to 'hurt' my feelings.