I just signed up for a one-year subscription. $26. I haven't gone through and checked everything out, but what I did find was fairly useful. Ostensibly, they have all the TSBs, which made for some interesting reading. The TSB for dash noises and rattles was actually quite helpful. Also, lots and lots of tire/wheel/spacer info with helpful notes.
Also included: a fairly detailed breakdown of OBD codes along with troubleshooting logic trees.
Let me know if I wasted my $26, but on the surface, it looks like it was worth the money.