It seems unlikely they'll be like the Yugo. That car was produced in a low quality factory. This is a modern product from Jeff Bezos that has fewer parts, not just cheap, poorly made parts. Yugo was Yugoslavia's only car manufacturer. Slate competes with all the other US brands so it can't just be total garbage going in. That wouldn't make sense.

Bezos is just an investor; he played little part in its design or engineering.