My wife and I are rabid Law and Order fans, so when they reran this the other week on my day off, I was excited to see it for the first time. I think the series is generally as good as ever overall (some ups and downs), but I agree with several other reviewers here that the classic years were those with Chris Noth and Jill Hennessy.
I have to say, having skipped it when it premiered, I really enjoyed the film. I thought it was a fantastic opportunity to see the familiar settings with a new pair of eyes (Noth's), to the point that I could forgive it some character inconsistencies (e.g., I had a hard time recognizing Lenny Briscoe). It also explained for me where Profaci went (other than over to the Sopranos).
Some remarks on comments by other viewers:
1) The latina maid
The numerous cast changes this series has undergone has given ample opportunity to show that cops don't like having to work with new partners. Logan didn't know there would be a spanish-speaking maid, and he didn't know Rey, so why would he bring him along?
Also, I can't speak for New York, which I wouldn't be surprised to find has a realistic policy for dealing with multilingualism, but we must remember that the L&O franchise is overseen by Dick Wolf from Los Angeles. Here in Occupied Mexico, a shocking number of the non-latino minority (particularly cops) display what I can only describe as clueless pride in knowing NO spanish whatsoever.
2) Staten Island
Having never been there, I can't speak to the endless disdain other New Yorkers express toward S.I. as a boring backwater. It's immaterial to the plot, however. From early on in the movie, it's made clear that the reason Logan is working petty crimes is that in his banishment, HE WAS NOT ASSIGNED TO HOMICIDE. 'Kay?
If you are a huge Law & Order fan, I recommend catching this film when it comes around again. Otherwise, I don't know what your interest would be.