I think it's fine for you! How much stuff do you carry on a daily basis though? I carry a long wallet, a small phone, and a little le sportsac bag that has things like lip balm in it, and there's always room to spare! But if you don't like it or are unsure then maybe it's a sign you should return it...the GM to me isn't as cute as the PM - it isn't HUGE like your SA is implying, but I feel like it's quite different from the PM.