Looks good to me. A suggestion for your next row (so you don't have to worry about matching seams)...offset the blocks. By this I mean sew the next row with the seam at the half way point of your blocks. (Your new row seams should be in the centers of the first row blocks). Next row, sew your seams like your first row. Next row, sew like row #2. Continue...
Clear as mud???