SPACI score report for 3o4w in ASTRAL 2.04:

PDB Entry: 3o4w
SPACI score: 0.6
AEROSPACI score: 0.6

Experiment type: XRAY
Resolution: 1.61
R-factor: 0.17
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.038
WCK2 WHAT_CHECK Ramachandran: 0.063
WCK3 WHAT_CHECK Chi angles: 0.215
WCK4 WHAT_CHECK Backbone: -0.267

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).