It's not been made entirely clear whether this is on both platforms or not, but I'd assume so. Regions are also yet to be commented on, so if you've checked your PSN Store/XBL Marketplace and haven't seen a change, it might be cause they haven't updated the store for your region yet, or it may not be coming to all regions. As for the quality of the content, I felt as if when the Jetstream and Bladewolf DLCs first came out, they played fine and both characters brought new elements to the table, but the reused assets and short length left me wanting, so I guess now that the price of admission is absolutely nothing, you can't really go wrong.
The DLC is being made free
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