I had the Hardstreet HR Slimbags on for about 1000 miles, but just discovered to my horror that the backs are cracked out around all of the mounting holes. (I'll try to attach a photo.) The cracks on the right bag are hairline, the cracks on the left bag have actually left holes where sections have broken out. I've never come close to the carrying the maximum recommended 6 pound capacity, so I know they weren't overloaded.
I purchased directly from Hardstreet and used their fixed mount hardware, following all of the instructions explicitly. The bags are pre-marked to drill mounting holes for a Raider; I used those holes to help me locate where to drill my mounting holes; the area that I drilled through was the same apparent thickness as the area that they'd marked, so I don't believe it was an error in installation. I have an email in to the only support contact that I could find and haven't heard from anyone yet. I can't find any warranty information on the site, nor on the paperwork (installation instructions) that came with the bags.
I love the appearance of the bags and they were a great addition. Right now I couldn't recommend them. I'm hoping that they'll stand behind their product.
Does anyone have any experience with Hardstreet from a support or warranty standpoint? I found a very similar post on another forum, but there was no follow-up. I'll update this post if anything comes of it.