Well it was better than the DVD, the problem is that Memento was shot in 35mm, comparing it to the latest films like Batman and Iron Man etc is a bit unfair.
It's still a big improvement compared to the UK DVD (Don't have the American DVD of Memento)
The sound is the biggest upgrade for me but in terms of bonus features its a bit bare bones I'm afraid.
I think 3:10 To Yuma was a really bad transfer, very new film and was really grainy.
I think the 3 disk version is the best so far in the UK for value for money mind.
Memento still hasn't come out on Blu-Ray yet in the UK
Had to buy an American copy but Sony blu-Ray movies are multi-region anyway but some aren't.