Awesome bag and perfect size to not be in the way. Dual compartment is great to keep tools on one side and personal items on the other. Small enough to not be in the way of water bottles.
I was impressed by the quality of the bag which is well made and looks as if it will be very durable. It fits well and the fixation with the Velcro straps is secure, they can be trimmed to the appropriate length. A side entry bottle cage may make removing a bidon easier.
Love the size of this bag, doesn't interfere with my bottles and I personally think it looks much better than the top tube tank style bags.
It's also built really nicely and seems like it will last a lifetime.
The bag is aero and in the perfect position. I like to put mine in the back above the rear water bottle because I drink out of the front water bottle first until empty then swap. The bag also helps to keep the rear water bottle in the cage during bumpy gravel rides.