My wife recently got the in-laws hooked on Sparticus. I only saw bits and pieces as my wife was watching it because it was during my last and by far busiest semester of school. The pieces I saw were almost invariably awesome, i.e., hot.
My in-laws started in on this new Sparticus mini-season or whatever, the prequel thing, and they seem to sit somewhere between indifference and disapproval. I get the impression that they don't find it anywhere near as compelling as the first season.