My Opinion...
So I played the pre-release of the game, and in my opinion... It's okay. There is going to be new adjustments made. Such as the food bar. How many of us actually feed our person? I know that I just usually let my avatar die, obviously because I don't really go exploring much. My brother and me will be playing through 1.8 together on a server, discovering valleys and villages... So if I open the port, I'll let yall play on it. I still don't think the sprinting thing was a very good idea to. Their making it seem more real then it really has to be (in my opinion)... Like I wish they could just keep it natural and just add more monsters. The new monster (The Endermen) is pretty cool I guess. I mean, if you like to be creeped on 10x harder then a creeper.

Anyways, I'd like to hear what you think about it. Feel free to comment and express how you feel.

Here are some links-

Pre release of the game
www.minecraftforum.net/topic/611468-want-to-play-18-early-heres-how/page__hl__minecraft+18+pre+release

Youtube video by: ImAnderZEL
www.youtube.com/watch?v=C_uqjfaE6e4&feature=related

NOTE:
The Pre Release was released by Notch himself according to some forums.