Guten Tag, Karl... (your english is excellent ... My German: All I can say is Guten Tag!)
Part of what I do for a living is tech support (Apple Consulting), so I, too, need to carry around my 15" MacBook Pro and everything that goes with it, including my iPad and perhaps a couple of books, papers, a photo of my other Tom Bihn bags, a water bottle, and more, and more, and more ... all in my new Super Ego. I was using a Zephyr for the longest time, but it is more compact doesn't accommodate much more beyond the laptop and ipad and chargers, that is about it. Still looks like new, though!
You DO NOT need to use a Brain Cell to carry and protect your MacBook Pro. For a while I used my nicely padded sleeve from Waterfield Design. No problem at all. However, I took a chance and ordered a Brain Cell. I wanted to see how it all worked with the special Annex Clips in the bag. If I didn't like it, I would return it as I was willing to take the shipping costs hit. But, as with all other TB products.... because of my Bihn Acquisition Syndrome (BAS), I find it impossible to return ANYTHING!!
Seriously, though, the Brain Cell is quite nice. My feeling is that with the shock-absorption that it has, plus having it clipped into the bag (it's easy to unclip and remove), my MBP is very secure. I also have the iPad in a TB Cache.
So, that is my experience with the Super Ego. I can't tell you about the smaller sibling - the Ego. For me, I knew I wanted to go with the largest for those times I need to take more items than the standard MBP/iPAD kit.
Best regards,
Sandro
Someone please help me!
I have BAS (Bihn Acquisition Syndrome)!!