I started H1 when it was preview & ran it & H2 then skipped H3 as it looked v awful. We are just finishing my intervening story arc & will start P1 hopefully in October (We play monthly & often skip, 3 of the players are using the pregens ...).
H1 was fun up to the Dungeon which was a bit arbitary & too long. 6/10.
H2 I liked a lot but I did not run it was well as I could have - our long gaps broke continuity & so the development around the 7 Pillared Hall was lacking. The PCs seemed to be tracking lost slaves for about a year. I like the sub dungeons & the fact they were the same type of monster as they were variations on the theme. The Green Dragon was one of the most fun solo encounters I have seen - the traps made it so. Anyway its 7.5 out of 10
H3 looked really annoying - lots of hostile untrustworthy factions & a "lock in". I did not long consider running it.
P1 looks qute fun if grindy. I plan to slim it & let the characters get to the point faster. Needs more RP in it I feel. I do not use XP so I can easily level them at the right rate (ie even faster - it's still a lot of player weeks at a level even if it's not a lot of adventure time

). It reads like a 5-7
P2 looks great. It the reason I want to keep going. I must prep it properly to get the full RP benefits of allying &c. I plan to stop after this as it will be late 2012 - almost 4 years of play. ooks 9/10 ish.
I have been going through reducing the amount of enemy controllers & MM3 ing the monsters (lower defences on elites, more damage, revised attack bonuses & lower levels where the changes make them look much tougher.)
My party is just wrapping up P1.
I think the biggest single issue with all these adventures is that they're far too long. Instead of covering 3-4 levels, most should be 1-2.
Toward this end, I've switched to removing all but the most interesting or important encounters and filling level gaps with other short adventures.
This really. 2 levels per adventure works for me & but I do not need filler as I just level people when I want to - not a probelm given my slow rate of play.