Don't know how it stacks up to Seasol or the Aldi one in quality. The instructions state a higher mix ratio of 25mL/9L.
I haven't used the seaweed stuff for years but I impulse bought a couple of bottles anyway based on the price lol. Mixing 25% extra still works out cheaper than the previous Aldi special ($10) or Garden Basics at Bunnings ($10.58) so seems a decent deal, on paper.
Put 100ml per 100m2 over your lawn every 4 weeks over summer.
Your lawn will absolutely love it. I have a Venturi system to put my products out. Takes a few minutes each time.