If you thought Heroes was good this is better (IMHO).
It is very well produced and considering the premis (wildly outathebox!) the characters are believable and fun.
I personally found the acting and direction wonderful and this is another post 24 show (the series 24 seemed up ‘up’ the stakes for American series and gave a new yardstick for them to aim at – not had anything like that in the UK since Red Dwarf)
If you liked Heroes and The Lost Room, you will like Dexter.