Rarely do inventors and product creators possess the business skills necessary to launch a successful startup. That's why they need an effective parter.
It's amazing that people seem to spend more time reading reviews of a restaurant they're considering going to for lunch than looking into the companies and people they're considering working with.
It pays to find someone that you trust and enjoy being with for hours at a time, even through hard times. Look for these additional traits to make a business partnership work.