I've got the same one and use it on trips, I've used it for everyday use. It's nice because it's small, easy to remove and put on and comes with the handle for carrying. I've had my wallet, camera, extra batteries, mp3 player, maps, sunglasses and neck warmer in there all at the same time. The nice thing about it is it has a rubberized hole on the side for earbuds to run through. My problem is I keep wanting to add for things into it and when Nancy recently joined my at the Nor'East rally last September we were a little strapped for space since both saddle bags have tools, oil, filter and cleaning supplies (not that I use those much).
I recently picked up a
Sargent's Cycle Super Bag. The thing is huge if fully expanded but I like it for it's versatility with two different map sleeves, three exterior pouches which can be relocated in several different spots, as well as the option of either being magnetic or strapped to the tank. I also picked up a
Powerlet Powermate Tankbag kit which brings power to the inside of the tank bag allowing me recharge the mp3 player and cell phone while on the go.
A little bit of overkill I admit but it's more for touring than everyday riding.