I don't have that bag, but I do have the commuter which is also made by Arkel:

http://www.arkel-od.com/us/all-categ...-bike-bag.html

The bag itself works very well for me and is easy to take on/off the bike, and is easy to get into and out of while off the bike. The bug is a tiny bit larger than the commuter and seems like it now has a U lock holder for it which is handy. I don't like backpacks so I chose the single shoulder strap commuter with laptop sleeve (I don't use the laptop sleeve much at all anymore, though but it was convenient while I did). Arkel bags have adjustments to move it forward and back on the rack which is great to avoid heelstrike on the bag, and once you get used to the fastening hardware it is very quick and easy to hook it to the rack. I've had the bag fall of my bike twice, and both times were because I didn't put the bag on all the way.

I've had my bag for more than 3 years and it has held up extremely well. I don't anticipate this bag wearing out within the next 5 years either, and so to me the brand represents a very good value because of the longevity.