Rucksack with Zips - Zara 39,95€

I absolutely need this bag. Need is a very strong word, can I live without it? Yes. Do I want to live without it? No!
I recently got a new laptop, and it's way smaller than my last one, so my laptop case is ginormous for no reason, and it's really heavy (problem I already had).
So I've been looking for laptop sleeves or a bag that I could carry with me. And this one it's just perfect for travelling. Once or twice a month I go on a 4 to 5h bus trip to my home town, and I hate carrying around my suitcase+my laptop case+ my handbag. This ones seems to have just the perfect size to fit all my life in it, and I can use it as a backpack which is just awesomelly perfect ^_^
I'm in love basically. I need to check if it's in my local Zara and convince my mother that I need it, and let me buy it. I mean it's not affordable at all.

Oh an opinion please, it's better for me to still buy a laptop sleeve, right? Just to keep it safe inside the bag...