As long as there was nothing deceitful, I don't see the issue. You were told the specs and the price up front and received what was advertised. And like you say

As long as there was nothing deceitful, I don't see the issue. You were told the specs and the price up front and received what was advertised. And like you say, you get the added benefit of being able to change your mind later for no additional cost or hassle.