I ran the adventure last night and it went very well.
Started around 7:45 pm, finished around 11:45 pm.
The party guessed that the dragonborn would probably be safe from any traps, so sent him into all the rooms first.
The first encounter with the drakes was sllooowwww..... partly due to the players having to get back into their characters mindset and the use of the d&d character builder power cards (had to keep pointing out that their attack bonus and damage was at the bottom). That lasted 6 or 7 rounds at least, and people were considering resorting to dailies in order to beat the things...
The encounter with the dragon though... They set of the menhir trap, so he was expecting them. He also had the highest initiative role, so Frightful presence (which affected all but the halfling thief), and then dragon breath (that missed everyone)
Then of the 6, only tthe dragonborn paladin missed. Everybody used dailies, and where possible daily weapons and utilities to enhance the hit chance. They more than bloodied the dragon in a single round of combat, which meant i could do the auto recharged dragon breath, this time hitting 2 of them.
Second round, the dragon bit down on the paladin, and he missed in melee so it tail slashed him, leaving him with about 6 hp left... Then the party cleric, who is pretty much the laughing stock because he never hits, got the killing blow.
They avoided all the other traps except the spear chuckers in the pillared halls.
The training room went very nicely. By that time, everybody had figured out the characters abilities and were comboing on creatures nicely. Party is effectively the paladin, rogue up front in melee, the cleric buffing, meleeing and lance of faithing where-ever is useful, and the mage, ranger and warlock at the back firing ranged attacks.
Best moments: them taking out the dragon so quickly, the ranger doing 2 interrupts in a single round and wiping out 4 creatures that round, the halfing player going 'oh no you don't!' as he plays his second chance, and then me laughing hysterically as my re-roll crits...