I did enjoy the show when I remembered to watch it, but for some reason, I could never remember when it was on. Then they put it in hiatus forever, and I definitely don't know when it airs now.
I think that the concept IS better suited to a limited run. And I hope that they do wrap everything up in the last episode.
The original British version ran for only 2 seasons, and ended by the creators' choice, despite getting big ratings.
Maybe they were right.
Though I haven't yet seen ASHES TO ASHES the spin-off.