GMAT Strategy

Plan on taking the GMAT last weekend in June and wanted some advice on which study method to purchase. I have been studying on my own for the last 2 months and looking for that extra edge as I get closer to the test and deeper in my studying. Debating on whether I should go online prep or opt for a classroom studying. I have looked Magoosh online gmat prep and wanted some advice from anyone who has went the online prep route. Thanks