Should I get this game? The demo was fun, but I want some opinions from people who have played the full game.
The series is a massive "grind this monster this many times" fest when going after materials for equipment since there isn't a level up system (at least for you; your companions on the singleplayer side level up in the traditional RPG sense, though) which IS very repetitive, but if you set goals for yourself, it's actually not that bad. And there are some monsters that you probably might like for one reason or another (looks, being challenging, etc.). Although playing solo will help you learn how to play, the biggest highlight is being able to play with friends (of course).
Speaking of which, when my friend introduced me to Monster Hunter 3 Ultimate (Wii U/3DS, though I got the Wii U one first since that version was the only one with online play out of the two), it was kinda a bland solo experience for me at first... That completely changed when I started playing with others online. Granted, it's not exactly a MMORPG experience, it still definitely changed my opinion about the game.
So... yeah. Although this series isn't for everyone, the online experience definitely makes it worthwhile (or at least, gives you a reason to keep playing). If you're truly dedicated, you can easily put over 300 hours into a save file.
EDIT: The Link DLC is now out! Be warned that it's a 7 Star Quest (equivalent to G Rank) even despite the minimal requirement being HR4.