I've done two raids so far. Failed both, but learned a bunch.
Very generally, Rujark was easier, but needed a lot of DPS to win. The goblins are a pain, they run for help. The other troublesome point was a group of MOBs that had to be killed in under a minute each; at that point we failed due to insufficient DPS; if they're not killed then they summon all of their fellows.
Mistmoore was more difficult, especially for pulling, but was much more straightforward (as far as we got at least). We did not get to the bosses, but we did take out a mini named who quadded/flurried for 2k and proc'ed a 1500 lifetap.
Yeah, we took him out on the fourth try. Still not bad for a non-VT, non-Elemental guild.