Just finished yet another marathon and here is my verdict. Samurai Deeper Kyo (SDK) consists of 26 episodes, each 20 min long. Given its shorter than other series that I been watching, I think SDK does a pretty decent job of getting a very complicated story line accross.
Still there are incomplete story lines, sudden introduction of characters and names that somehow does not jive. After finishing the series, I googled for spoilers and found a few answers. It seems that the anime represents a short summary of the manga which goes into more details. Still the ending does leave one feel unsatisfied.
Summary, if you are not the type to be obsessed with details and have some spare time for some complicated story line that will keep you guessing, then watch SDK.