I got the game demo in the mail from Capcom today.
I got to play it for about 20 mins before I had to turn off the Wii to do stuff for work. My impression so far:
Playing with a Wii remote sucks! I so wish for a Classic Controller (which I will have coming with my full retail copy of Tri). For anyone that played the original Monster Hunter on the PS2, they will probably be really irritated by the Wiimote. But then again, I'm not a fan of the Wiimote for action games. I'm going to keep plugging away at it though, just to try out all the different weapons.
Also, I know we get to customize our characters in retail. Would it have been too much to ask to include the character creator in the demo as well?
Edit: The game has two hunter missions you can go on. I played the first one where you go after a huge raptor boss. I was very surprised to see no ingame tutorial, especially for a demo title, you literally just get dumped into a mission and you're left alone to figure things out (hopefully this changes in the retail version). The demo disc did come with a huge poster that lists all the weapon types and how to control them via the Wii remote. I must have been quite a sight earlier... sitting down, with a huge ass poster on my lap, trying to figure out the different attacks while a pack of raptors gnawed on my ass.