I'm starting chaos dwarfs and taking them into this next tournament season (or 3/4 of the GTs)
Here's my thoughts:
the core Infernal guard are solid. They're a good buy, but not amazing. They cost a fair amount, but are not exactly chaos warriors. Blunderbusses are amazing, but make the IG cost astronomical.
Fireglaives are pretty bad, as they're BS3. Yep. bad. However, are decent as chaff killers and can hold (acting as halberds) but really, great weapons or Stock: HW/Sh is how you roll.
Hobgoblins are ok, they have their uses, but rarely will win fights.
The warmachines: Chaos dwarfs are not speedy, not given a lot of attacks, so they (sadly) need their warmachines. Even the 'elite' troops (Iron sworn and Bull centaurs) have low attacks (1-2 max) so the enemy does need to be weakened by some artillery
That being said, the chaos dwarf artillery is solid. Especially with a demon smith around.
There's plenty worse around and easy ways to take it out. Warmachine hunters wreak havoc. Cannons (empire, ogres and dwarfs) wreck our batteries. Just wreck it. For a better price as well.
The k'daai? If an army list doesn't have someone with the Dragonhelm/gem or something similar (dragon armor, blackened plate) it's the opposing players fault.
"oh this thing is so broken!!!"
easily the most mitigated monster out there. It's a game of chess to get him INTO a good fight.
Magic and magic weapons wreak havoc on him. A hero mounted/ unstompable, with the 2+ v fire and a simple 5 pt magic weapon will win every time . plus the burning bright rule (Toughness test) will put a few wounds on ourselves (happens every game)
That and frenzy means he can be lured around by chaff.
His price is the highest in WHFB monsters. Personally, after playing Dark Elves, I'd rather have two hydras than this guy.
I've gotten to the point of almost taking him out, but really, I'm lazy and mine is a center piece (big demon). he's too easily mitigated.
The lore of hashut is great, but everyone saves their dice for ashstorm. So you'll never get it off. Some spells are amazing vs some armies, rubbish v others.
Really, i've found more success in using the dwarfs to FIGHT rather than stand there and shoot w/ warmachines. The cost of them adds up and makes it a sub average gunline army that crumbles even more than most (think empire).
it's a fun army. i've been working on mine and you can see my blog for some WIP shots
I love the models, they're a pleasure to paint and are worth every cent.
the army is a well known facet of WH lore, and has finally returned. Why would anyone be upset that more people and armies are coming out? In my area this army alone has gotten 2 converts from Warmachine
(i have some new Mantic abyssal dwarfs, in box if you're interested. )