Is 不仅仅 the correct word? In the following sentence:


  这家小资的咖啡店本身不仅仅是一间咖啡店，还是首个提出咖啡情绪疗法的品牌。


I know 不仅 means "not only", and 不仅～还是 means "not only ~ but also ~", similar to English idiom.

However, this sentence uses 不仅仅, not 不仅. I wonder if it is a typo, or correct sentence. In that case, what is the difference between 不仅 and 不仅仅?
Yes, 不仅...而且/还是...  is equivalent to "not only... but also...". I think 不仅仅 fits here. Because the author really wants to emphasize the achievement of this coffee shop, which is '首个提出咖啡情绪疗法的品牌'.

Example:


  他不仅是一个模特，还是一个大学教授。


This just tells you that he has two jobs.

But if you say,


  他不仅仅是一个模特,还是一个大学教授


this means that being both a model and a university professor is really impressive.