Well, they certainly aren't groundbreaking maps. I bought them, and played on them a few times. If you have been playing Resistance online religiously, you'll probably enjoy the maps, but if you are tired of the maps that are "Free" on Resistance, then these new ones aren't going to put you other the top.
All I'm saying is, these maps probably aren't worth your money. They aren't all that different from the ones you've been playing on for months.
More games will come out for the PS3... sigh... eventually

. I was a big fan of Resistance, but I am kind of falling off the wagon at the moment. We waited much to long for these maps, they were repeatedly delayed for no reason, and yes, they are expensive.
Hope that helps.