tried it in simplify3d and my he3d k200.
at 0.32mm and 100mms max print speed - comes in at 1hour 23 mins.
Slices fine.
There is nothing wrong with the stl file.
I can get it down to 48 minutes at 0.4 layer and 150mm/s speed.
So 2 hours would be about right for most non-deltas running at silly speeds :-)

Can't help on the slicing - works fine for me.