They are quite difficult runs when you consider they are meant for level 52/53, but with the group I was with (myself a 59 Champ, 57 hunter and 53 Minstrel) the difficulty seemed just right. Knowing that I would have to tank, I made the mistake of forgetting to bring a one handed weapon (so I could equip my shield). Swinging around my legendary two handed axe I was taking quite a bit of damage to begin with, the Minstrel trying to heal me as fast as he could. Fortunately I found a one handed weapon en-route, a weak level 52 one, but it would let me equip my shield.

Then when cashing the quests in I dinged level 60 and was able to finally equip all the lvl 60 gear I had been lugging around with me for the last couple of levels!
I have been enjoying LOTRO now for five weeks since my passion for it was rekindled on hearing about the Lorien content. I am not sure how long this run will last though. I still have a few quests to do in Lorien and I suppose I have a few instances in Moria I have not ventured into yet, although I have no interest in chasing the radiance pieces (4-6 runs of each instance for each piece - no thanks) or indeed any Moria quests for that matter. The Etten moors (PvP) is always another source of entertainment if things look bleak, either playing as my Champ or with my recently rolled Warg.
I suspect there is enough to keep me going until Book 8. My money is on Dol-Goldur for Book 8 by the way, unless Book 7 is very tricksy ;)