Experience with ASTER DEM TC?

Has anyone noticed problems using ASTER DEM for TC in areas outside of ±60 degrees? I’m trying to understand how much I can rely on it.

The ERSDAC validation report shows they have fixed many artifacts in v2 but some areas may have fewer stacked observations and steps and voids may still be noticeable.

http://www.jspacesystems.or.jp/ersdac/GDEM/ver2Validation/Appendix_A_ERSDAC_GDEM2_validation_report.pdf