In Japan, Monster Hunter in general has been like the second coming of Pokemon. They have a MH mmo for pc and xbox over there, two games for ps2, three for wii(A remake of the original, a spinoff, and tri itself), three for psp(A fourth one is coming soon), and the new Metal Gear for psp will feature wyverns from monster hunter. Also, all three mh games on psp are the top three best selling games on psp in Japan of all time.
Now back to Tri itself. They have made it easier and already, there are like 5 to 10 thousand people online already. The online is free too and supports wii speak and usb keyboards. They have taken out every old boss monster except for the rathian, rathalos, and diablos. The levels are larger and cooler from what I've seen. Where originally there were the volcano, forest and hills, swamp, rainforest, desert, jungle, and snowy mountains, they now have in place for the old areas, sorts of combinations of the old areas. The island is basically like the forest and hills but with an ocean, the desert has trees and foliage and is situated on a bunch of interconnected mesas, the new glacier area is like the snowy mountains but with glaciers obviosly, the flooded forest is the swamp, rainforest, and jungle rolled up into one, and the volcano has forests around it. You can swim in the game, especially in the flooded forest which is mostly underwater. Also, for the first time, the creatures interract. For instance, some dragons will land on herbivores and begin consuming them in front of you and some of the animals breed at certain times, drawing forth exceptionally large alpha males which give you better materials if you kill and carve them. So yes, I think this one is much better than the previous mh games. It has gotten me to play my wii regularly again, which few wii games have ever accomplished. I'll see if I can put up more videos to showcase the game in subsequent posts.
Also, for any who are trying to get the game, I suggest getting a wii classic pro. Like super smash borthers brawl, the wii remote is dificult to play with. I have a pro, but I'm about equally proficient with both at this point because I played the MH3 demo for a month with my wii remote. They have a bundle with the game and the pro controller for 60 USD(Don't know how much in quid, euros, canadian $, or Australian $ that is) and it will save you about ten bucks on buying a pro controller seperate. They also have a bundle with the game, a controller, and a wii speak, but I don't know ho mucht that costs. Considering bundles are money saving and buying a wii speak and pro controller costs 50 usd together, it's probably like 70 or 80 usd.
Edit: Yes, xbox live is indeed a cess pool. Most people playing Tri right now don't have wii speak, but rather a keyboard or they use the in game chat function which is clunky. You have to become friends with someone to talk with wii speak, and even then, most people who I've talked too aren't mean. We don't direct expletives at each other and only type them in if we die and players have to work together so they're usually only talking because cooperation requires it.
Also, for anyone interested in the creatures, the mh wiki has a bestiary. http://monsterhunter.wikia.com/wiki/Monster_Types
Edit 2: Here's some more vids, some depicting mh tri, some depicting other games in the series. You can tell when it's tri because the graphics will be substantially better. [youtube]http://www.youtube.com/watch?v=cAbQtkQVMmM&feature=player_embedded#![/youtube]
[youtube]http://www.youtube.com/watch?v=2iQ1mNVDt-Q[/youtube]
[youtube]http://www.youtube.com/watch?v=Sb6B01f0zv4[/youtube]
[youtube]http://www.youtube.com/watch?v=sXqAwbO2878[/youtube]
[youtube]http://www.youtube.com/watch?v=6O7Eg2spJ1w[/youtube]
[youtube]http://www.youtube.com/watch?v=P-OHB_RUYMQ[/youtube]
[youtube]http://www.youtube.com/watch?v=W0zWzcaQ3Hg&feature=related[/youtube]
[youtube]http://www.youtube.com/watch?v=Gvv7HWw3wUo&feature=related[/youtube]
[youtube]http://www.youtube.com/watch?v=roMM8lnM0uc&feature=related[/youtube]