I've enjoyed them. Khans and Death Throes being my favorites. Ghosts and Blueprint also superb.
I prefer the more shorter one and a half hour format of the earlier series though as it's possible to play in one listen while still following the thread of that particular segment. By Blueprint for Armageddon they were getting to be 3 hour epics and now each is 4-5 hours (!). I've found this true of most podcasts in general, they usually gain their audience at a shorter length format and then progressively get longer over time.
Security Now is an example of a podcast I used to follow that I feel began to meander in focus a couple years ago (not how I feel about Carlin's podcast btw, a different observation). Was previously 1 hour to 1:30, sometimes 1:40-50 for some, then the upper range became the norm with episodes growing even longer to 2-2:30. There's only so much meat to fill an episode, and despite some episodes still being excellent I pretty much stopped listening which also had to do with Leo firing long-time panelist Dvorak over clock boy which was ridiculous as he was one of the sole reasons some tuned into some episodes of TWiT.
