This bag is well constructed and just about the right size to carry everthing you need on a day trip out. Sunglasses, water bottle, visor cleaning gear, gps case and still had a little room to spare. You could probably fit a clear visor if the pack was extended to its 8L capacity. The fitment is easy, though you will need both medium and low strength locktight which delayed my installation by a day or so. But once the mounting ring is fitted, attaching and removing the bag is very quick. The ability to shift the bag back and forward on its rail to re-position it for comfort or to suit your machine is incredibly useful. Its low profile is not intrusive into your view of the speedo and avoids the wind, so it doesnt shake or judder. All in, a very well made piece of luggage.