At times I can close my eyes while listening to Black Legs and feel like I'm listening to an old Assfactor 4 record. It's fast, it's punk, but there's that certain ingredient in there with the guitar work that adds an edge of darker melody. Other times this falls into the predictable punk category and sounds like another early Black Flag clone. Luckily they shine more than faulter.
If I had to guess, just in terms of musicianship, we're dealing with some folks that have a good grasp on music beyond playing four chord fast punk. It shows through at moments and I'd be interested to see them develop this more.