I think it is worth getting a Hyper64 just for playing Warriors Rage. It is definitely one of my favorite games of all time.
I've been a Samurai Shodown fan for a long time. The main reason I purchased my Neogeo 16-bit was because of the Samurai Shodown series. I not only loved SS for the excellent playability and control, but for the incredible artwork, style, and most of all - character design.
When I first heard about the 3D versions of SS on the Hyper64, I was a little scared. I thought SNK probably ruined the look and style of the characters. But after I played Warriors Rage the first time, I was amazed how incredible it looked and I was not disappointed.
It is true that the controllability is worse than the 2D versions of SS and there are larger lag times. But these things have to be accepted in 3D games. But compared to other 3D games, Warriors Rage is the best!
The characters are modeled almost perfectly and look great. There are animated with incredible STYLE (reminds me of Ninja Scroll type animation). The control layout is very similar to SS4, except with the addition of depth dodging (side stepping).
There are an incredible number of special moves in this game. Many of the original moves from SS1-SS4 are still in the game and have been beautifully converted to 3D. There have been many new moves added to the game as well. I love watching the special moves! They are all animated so well. Watching Hanzo snapping bones and slitting throats is incredible. The spine tingling sound effects and rotating camera angles really add up for beautiful eye and ear candy. Rimiruru has a particularly cool move where she grabs the opponents arm and twirls them around her in a circle (as if she was doing a hammer throw). It is neat how the opponent spins towards and away from the "camera". I could name examples all day. Mabey I will try to post some video clips.
Warrior Rage definitely has that SNK "style" that we all love!