Soft: I have soft bags because I am cheap. Rain would be one reason but I recently found 2 1/2 gallon zip lock bags to store things in. A friend recently had one of his soft bags cut off of his KLR while it was parked. I am going to try and zip-tie a couple points of the bags to the HT OSR. Soft bags can be narrower. I live in California and we can split lanes where wide is not good.
Hard: If you ride off-road hard bags can cause damage to your leg if it gets caught under the box. Mounting the box higher can help with this problem. Agree with the security issue. Agree about being heavier. Agree about cost.
2005 KLR 685
2015 Yamaha Super Tenere ES, 5/23/2015
2012 Yamaha Super Tenere; Purchased 7/30/2011; Sold 5/23/2015