This stone scores 3.5 on HCA. "Total visual perf: Very good, worth buying if the price is right." You can plug in numbers yourself here: http://www.pricescope.com/cutadviser.asp
I'd probably pass on this one unless it was a total steal.
Good luck!
-Anna Magdalena
ps I noticed no one has answered your more specific questions yet.
Unfortunately I don't know either...experts??
Is a thin or thick girdle better?
Is it ok to have a small culet or is non better?
can someone tell me what range to look for in depth and table?
should polish and symmetry be excellent for it to be considered ideal?