Is the batman arkham city dlc good?

is the batman arkham city Robin and Nightwing dlc any good? i saw they were bundled together for 15 bucks on xbox marketplace,Is the batman arkham city dlc good?
yes and no. if you're not into the challenge maps no, because thats the only place you can use them. combat maps are the same, you get a couple different gadgets but you'll barely notice them, they both have their own style and fighting moves, but only aesthetically. the combats mechanics are the same maybe slightly faster. if you're a big fan of the predator maps yes. like catwoman the characters play different and the gadgets make a huge difference. they each come with their own maps and alternate costumes too, nightwings is more of the same but robins is kind of a side scroller beat em up, which is a nice change of pace but not impressive.

so long answer short, yes if your desperate for challenge maps especially predator. if not, a huge waste.