When I first saw it I thought it was pretty lackluster, awesome fights but shitty acting and dialogue. I still stuck with it though because I've always been fascinated by that era. Sooo glad I stuck with it because the show improves more in the first 4 episodes then most during their entire series. The dialogue remains kinda cheesy throughout but the acting improved greatly and the plot had me hooked. If you overlooked this show then you made a huge mistake. It's really too bad that Whitfield won't reprise his roll as spartacus, you really start to root for the guy and he's a big reason why the show is so good.
Also if you like MK Legacy you should check it out because some of the same writers worked on Spartacus.