Not trying to be overly negative or elitist here, but it must be said...
Those welds are horrendously scary! No way would Nashbar or KHS put that quality on the market! (And I sold KHS in the 80's when their quality was bad, but not THAT bad. They actually used lugs that looked pretty good.) This looks like a bargain-basement big-box frame that was welded by half-wits. I'd NEVER trust it with my soul and that of my stoker's! MAYBE for only the most casual beach cruising. But any hills or potential speed? No way. And the stoker saddle height looks like this might be intended for a larger rider. Nope, that would make that thing noodle like crazy!