The only difference between the present perfect simple and the best present perfect continuous is the emphasis on time. The present perfect simple focuses on the action itself, for example : - I've just met Anna -He's been to the doctor today Whereas the present perfect continuous focuses on the duration of time an action took: -I've been waiting for 6 hours already! -I have been working for this institute for 10 years -You look all sweaty, what happened to you? I've been playing football all day! To sum up, they both have the same uses but one puts emphasis on time and the other puts emphasis on the action itself