My old MS3 had a trial for almost 2 years (don't ask me, Sirius just never shut it off) and I got addicted, so yes I will renew my subscription after it ends the trial. Currently im paying for the on demand aswell since I listen to it a lot from my phone and on my work PC.
I love the Jason Ellis Show, Octane, NFL Radio, Stern channels (100, 101), comedy channels are OK at times. Its worth the money to me since I drive fairly often.