Have to say I enjoyed it, although I did think it started quite slowly in the respect of getting things to actually happen. I have the feeling it's going to akin to Lost - except with super powers.
Namely multiple angles, big emphasis on character development, and strung out plotlines that can take days to move along.
None-the-less, the show has me immediately interested, and I'll continue to watch it after work (as I finish a half hour before it starts - lucky, eh? heh).
As Beff stated, I do find Hiro to be quite funny and I do like his sense of innocence.
"Spock, use your 'Death Grip'!"