First interview with HR, a great showcase of the role, and the company, and what is expected in the following discussions.
Second interview with a team manager. Once more, a relaxed and honest discussion.
Third interview - study case around the soft skills of a sales executive. Very difficult to manage, unrealistic scenario of what a discussion with a client would be like. Nothing technical, no product knowledge tested, no preparation would be required for knowing what you sell, in such a scenario.