The disc retails for $14.98. That means you'd most likely be able to find it for under ten bucks. As much as we'd all love a box set (which I would imagine and hope will come eventually) this is good for those that may not want to pluck down a large chunk of change for the whole season.
The disc also will contain audio commentaries (with Supervising Producer Craig Kyle and Head Writer Greg Johnson), a featurette and character profiles.
If anything, it'd make a good gift for the X-Men fans in your life. It may not be the entire season but it's like an animated movie release.