learning spanish currently and I disagree on the grammer part. I never made any progress with spanish until I found a program that started with drilling all the grammer rules. after that my learning took off
Grammar is the analytical part of language. It is not the language itself.
Try reading Spanish texts for a few days without doing these drills and you will notice a massive increase in relative comprehension.
Obviously knowing grammer isnt going ti get you all the way there, probably not even 10 percent, but its a much much sturdier foundation than "donde esta la biblioteca", etc