SPACI score report for 3wff in ASTRAL 2.06:

PDB Entry: 3wff
SPACI score: 0.45
AEROSPACI score: 0.45

Experiment type: XRAY
Resolution: 2.05
R-factor: 0.188
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.556
WCK2 WHAT_CHECK Ramachandran: -1.054
WCK3 WHAT_CHECK Chi angles: 0.081
WCK4 WHAT_CHECK Backbone: 4.798

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).