Even if it's hard to show something that's not finished and polished, it's essential to collect early feedback. How else would you know if you're really on the right track?
|Feedback collection can be as easy as showing where you're at and asking open questions|
Then once you have the feedback include it in what you're doing. People will appreciate your proactive attitude and remember it once they get a chance to buy your product.
Look at things around you, how many were never tested on real people to collect feedback and led to big flaws? Do better and improve your products by collecting early feedback.