Joining the choir, etc... Basically I'm having a similar experience as most here. I find the combat mechanics quite fun, and the questing really really addictive. The graphics are quite nice as well, which frankly, I didn't expect, considering some media I had seen.
With regards to flaws, the game has quite a few of them. For the most part, I wish there was more transparency to the leveling/casting system.
On a different note, that Blackout synergy spell is really powerful. It can also be leveled up, so when it shows up, make sure to use it. My battle rank is 64 or so (currently at the start of disc 2), and I have Blackout II, Cyclops, Talisman Defense, and Talisman Attack, as my special (yellow) abilities. From a unit perspective, I currently have 3 4-character units, and 1 3 character unit. Their breakdown is: 1 Melee+Mystic (balanced) unit, 2 Melee units and 1 Mystic unit, and so far it's working out very nicely.
Reading this thread last night was interesting... I was really impressed when I read someone got the chain up to 400+. I hadn't even cracked 150 by them... until later, when I started a quest (Wisdom's Echo sidequest) and ended with 500+.
Pro-tip of the day: Make sure to talk with all people, even those without red outlines on their bubbles. A few of them give items. One of my current equipped swords deals a ton of damage + poison, and was given to me by some lady at a Pub.