It is about striking a balance. You don't want to spend too long on something but at the same time, you don't want an ugly MVP that will turn off potential use

It is about striking a balance. You don't want to spend too long on something but at the same time, you don't want an ugly MVP that will turn off potential users. I spent a few hours doing a decent website front with the essential details, with a working newsletter form, so that I can have that front up and running while working on an MVP. I wouldn't spend a few days or weeks on it. Same with the product - maybe allocate a certain amount of time where you would work on the design and then focus on the actual product itself. I also agree in getting customer validation before spending too long (ie more than a year) on a certain product iteration