I've owned 3 of the WBBB, 2 of which were XLCs. I'm 6 ft and while I can fit in a regular Blackbird, the XLC is so roomy and comfortable. The footbox is a great differentiator among hammocks--you get a much flatter lay with a shorter Ridgeline. The shelf is perfect to store more than fits in most ridgeline organizers.
I backpack so I went with the SL XLC (2nd Gen) and have enjoyed it immensely. I like to potential to reverse the lay direction. Adding Whoopi slings makes a great upgrade to quickly adjust the suspension while saving a few oz.
Can't recommend this hammock enough!