Diggyj,
As with any baitcasting set-up, the biggest issue that most people come across is being able to get any distance when casting lightweight lures. Fiberglass crankbait rods, and in particular, the Shimano Crucial crankbait rod (which is TC4 - not pure graphite), tend to have a bit more 'give' to them, which I find allows you to cast further, compared to a stiffer, regular crucial rod. I've got a couple of the med/hvy models in 7ft and they can cast 1/4 ounce lures no problem (matched with a high end baitcasting reel).
If you're interested in this rod, pick up a crankbait model in one hand and a regular crucial in another and shake them, you'll see what i mean when I say more 'give' and more 'whip'.
This rod is excellent for fishing crankbaits, plugs, spinner baits, and even top water. The slower tip, however, will make it more difficult to detect subtle hits and feel bottom, so this rod isn't perfect for senkos and for light tubes, but it will work.
I hope i haven't confused everyone, good luck with what ever rod you choose. I'll just say that if you're not looking for a flipping stick, this is a great baitcasting rod to go with, especially if you like making the long casts. Leave the senkos and tubes for spinning outfits.
-Drew