I've got Triumph saddlebags and my only complaint is the velcro holders which after a while they don't secure well; however, they aren't going anywhere with the seat securing them firmly.
Have been out in the rain and they've kept their shape very well (at least better than the stock leather bags that I had on the 2010 Thunderbird, that warped).
They don't hold a lot, but are functional nonetheless. Certainly better than a backpack and bungies. Overall, I'm satisfied.
On looks, I think they kill the bike, but I'm getting so old now, I don't give a rats about looks as I do function.