MissMe, I don''t know anything about that site but I have a few concerns about the diamond. It is listed as simply SI and may not be eye clean. Have they/you been able to take a look at the diamond in person and inspect the inclusions?
Also, though fancies can not be judged by numbers alone, this one is cut very deep which will cause it to face up smaller than it should. Also, I don''t like the only ''good'' polish and symmetry.