Schedules Direct TV Guide Rovi
Quick Evaluation from actual XMLTV provided
ID Y N N
Title Y Y Y
MPAA Rating (focus on Movies) 100% 50% (many entries missing) 100%
Viewer Star Rating Y N N
Runtime Y Y Y
Year Y Y Y
Description Y Y Y
Advisories (S, L, D, V) 84% 0% 0%

Conclusion:  Schedules Direct is the best source of Program Guide data if you want to be advised of content advisories, which can make a big difference between PG and PG (SLDV) for family viewing.