I've aso started to play this and am about halfway through I think. I 'obtained it by other means' because I ddn't want to wait 2 weeks for my pre-order to arrive in the post.
I have to say this is the best game I've played on the Wii, including first party titles.
The swing detection, the finishing moves, the special powers and the weapon upgrades work really well, particularly the finishing moves. The Bearded One said in an interview a while back that he wanted to create a sword fighting game that made the gamer feel like a badass, and he's certainly succeeded.
Technically, it's very impressive - high res textures, great quality rim lighting and the screenshots and videos really don't do it justice. And more importantly, once you've calibrated MotionPlus before you've started that's it - you don't need to do it again like you do by pressing down on the D-Pad in Wii Sports Resort. I'm guessing that it's using Ai's LiveMove middleware for the MotionPlus recognition and it automatically recalibrates whenever the remote is held still. You don't even notice it doing it, generally after doing one of the finishing moves you naturally pause for a split second and I'm guessing it does it then.
It starts off reasonably easy on Master difficulty (the middle of the three settings) but gets progressively harder. Like Chrizum I died a couple of times in the beginning but as you learn the finishing moves and special moves and use them it starts to get easy again for a short time, then the difficulty starts to ramp up to keep it balanced. As you get further into the game the enemies start to get quicker, occasionally do strong attacks, block and dodge your attacks, attempt to surround you and attack at the same time and have their own special powers. As I said, I'm about halfway through I think and I'm really looking forward to getting further.
This is guaranteed to get a Metascore in the high nineties, it's brilliant. If there's anyone having doubts whether to buy this game or not then STOP IT!!! BUY IT NOW!!!!!!!!!