If you can stomach the price, go with your gut and buy this bag.
The bragging points from the ad campaign have all sounded true so far, it's so useful, modular, waterproof, and spacious.
So far I have been using the smaller laptop bag part more often than the entire bag, which is more than enough for day trips, but if you need to bring a change of clothes, or bulkier gear like a midi keyboard or cameras, the bigger one does the job and attaches easily.
Pros:
Build quality - excellent
Materials - excellent
The functionality in general is just so good, so many nifty little features that I forget about/ discover, very good.
Cons:
just price really
Again, if the ads tempt you and you need a bag, and you can afford it, buy this one - it feels like it will last a long time and is great.