It is a 60/60 type stone. You may want to research what that means and how it differs from a stone with more traditional ideal proportions. It is a nice example of that make, but it will have less fire than a more balanced cut. It will favour white light return.
As @Dreamer_D stated above, it is a 60/60 diamond and not ideal cut. Have you seen this diamond in person? Have you been able to compare it to a more ideal cut diamond? They will perform differently - just make sure you know which cutting style you prefer before you buy.