i thought it was excellent. i read Coomic Book Resources' 'Behind the Eclipse' thing and somethings to bear in mind:
Hiro's vision quest is condensing time. The end scene with HRG getting into Mo's cab was at a later point than mr exploding glasses man, Sylar was already killing by then. there was a line cut.
Hiro's vision quest mixing time up also explains a couple of other temporal oddities.
Arthur waanted Nathan killed to 'send a message' to the DA's office to back off investigating Linderman.