I just recently purchased the DVD edition of these shows, and they are really interesting. The audio quality on the DVD is horrible for the early episodes (1983), but those have the nicer opening credits and generally very good storytelling.

So far I've only seen one of the later episodes, "Pick-up on Noon Street", but it was pretty nice. The audio quality is immensely better than on the earlier episodes, but the acting was a little more hammy over all. Robin Givens was good, and Boothe was great as usual. The actions sequences were pretty poorly filmed, though, in my opinion.

Overall, HBO had their hands on something special here. Power Boothe is (as others have said here) the best Marlowe ever on screen. I love Bogey, and Mitchum is great in Farewell My Lovely, but Boothe feels like he IS the Marlowe, and his delivery of the dialog and voice-overs is superb.

I really wish that HBO or someone else would do another remake of The Long Goodbye with Powers Boothe as an older Marlowe. That'd be the best of Chandler played by the best Marlowe.