I like it so far...I was actually just playing it a bit ago. Was getting myself unstuck. I'm not that far yet though...just about to head to the surface world. They've done some really good stuff with it though. I've just got two complaints, sort of three: One is what's up with no save points? Really annoying to get all the way to a boss...die...and then have to do the WHOLE area again. I understand they wanted to preserve the feel of the original, but they could have at least added in save points. Two is that a lot of the times...I don't know where I'm going. I know with the original games they used the whole "If you get into an area where the enemies pwn you, turn back around" concept...but dang, a little direction would be nice. Although this one does do better than 1 and 2 did. And the third semi-complaint is that bosses should have been toned down...they don't need two attacks to my one. They're strong enough as it is.
PS: Everyone with the game should put their friend codes or whatever...however the Mognet thing works. I want people to send letters to.