Suggestions for luggage with stock rack.

Looks decent, but they also claim water proof. They don't say water resistant. Do you have one of these? How do you like it?
I have one, the largest size. It has been to all 48 contiguous states, most multiple times, and through some very heavy rain, and never did a drop get inside. I have used it for four week trips a number of times and it held all that I needed. I am very happy with it.
 

Perfect ... just what I needed to know.
 
I have a Rocket X and do not like Saddle bags hard or soft but the tour-master luggage bags for racks are great. Still using the one left over from the Harley and has over 40,000 mile on it. Really has a great mounting system which works. Never have to worry about it coming loose. Several different sizes to choose from and yes are very much waterproof. The one I use is great for daily commuting and still maintains its original shape. Check it out at their web site. IT WORKS.