I'd like to update my previous review which I left 1 star because of the course cancellation and invoice issue. My course was finally re-scheduled to March 10th. My in-person contact with the front desk staff and my instructor Chrissy at Ottawa downtown office changed my view on this company. The reception area, kitchennett and classroom are clean and tidy. What impressed me and probably other students was that GK serves morning and afternoon snacks (cookies, fruits, coffee, tea, etc) that look very fresh. Most important, my instrutor Chrissy knows very well what she teaches. She used plain English and spoke clearly to make sure the students could follow her. I have recommended GK to my coworkers and one of them said he would like to register for a level 2 Excel course. Thanks GK and Chrissy:)