Well I wouldn't really call myself a huge fan of the "Mortal Kombat" franchise, but I did play the games when I was younger, even got a couple of them for my PS3 today, and have watched the older movies, series and even read some of the comic books. I like "Mortal Kombat" for what it is, martial arts fighting without the need to implement a deeper understanding for the reason behind it.
However, I will say that this "Legacy" series is impressive. Especially compared to the older movies and the earlier "Conquest" series. Why? Well simply put because of the production value behind it. It outshines the previous stuff by a mile and a half. There is just a heavier and better feel to this series, it is more in the spirit of "Mortal Kombat", if you will.
I like how it takes each character and gives you some background behind who they are and what drives them. It is all done in a relatively short period of time in each episode, so of course it is limited just how much background story you get about each character. But so far it has been great entertainment and added some nice details to the characters portrayed so far.
As for the acting, well I have been content with the people they have cast for the various roles. People have been doing great jobs bringing the characters alive and believable on the screen. My personal favorites are Scorpion and Sub-Zero, always have and always will be.
I find "Legacy" to be a well worthy addition to the "Mortal Kombat" universe, and it is well worth watching just for the production value behind the series alone. It is really, really great.
I sort of gave up on this franchise as a plausible rendering on the screen after the "Conquest" series, so it was just by sheer random luck that I came across "Legacy", and it was just out of boredom that I sat down to watch it. But after the first episode, I just kept going watching it all, it was just that good. So perhaps "Mortal Kombat" can have a glorious comeback on the screen and justify itself after some questionable previous movies and an even less so series. I am excited to find out...