Here is the Synapse loaded for the training I was in last Week on Cape Cod.
I escaped there just ahead of the Wrath of Irene as it turns out much of the area is still without power?
As you can see I have a load of stuff in there.
13" MBP in Incipio Shell
11" MBA in Incase Perforated shell(Very Cool)slid into Waterfield Sleeve
iPad in Otterbox Defender
Spiral Notebook,Handouts and Magazines.
Multi-Tool in RipOffs Sheath
Mag 500 in RipOffs Sheath
Strange little cricket Multi-Tool
MiFi 2200 in Bihn pouch
Lumix ZS3 in Waterfield Case
iPad Charger and cable
Heavy Duty Long iPad/Pod Cable
Glasses MicroFiber cloth
And the Bottle compartment can take a 700ml bottle easily and there is still room in most spots for more.