Use 'drawback' when discussing the less appealing parts of a plan or item, not the strengths. A big drawback of this smartphone is its short battery life.
Pro Tip 2/3
Comparable Alternatives
'Drawback' is often used comparatively, suggesting there are better options available because of the drawback. The main drawback of the apartment is its location, making the one downtown a better option.
Pro Tip 3/3
Critical Tone
'Drawback' suggests a critical perspective. It's less neutral than 'disadvantage'. Her lack of experience is the only real drawback in her job application.