Hi,
I have the Hepco hard bags and have been pleased. Install was a chore but mostly because I am not so bright

Hardware is all there and it's all solid.
They look great and quality is sound. The hinges are the only part I question. They are just a solid bit of plastic that bends rather than a real hinge. Sort of like those Styrofoam containers you get for your carryout. On the other hand, they have held up fine.
There are several different styles to choose from. I went with the Lock-it side carrier and the Junior 30 hard cases. I would have liked a bit more storage room, but the 40s just stuck out too far for my taste, and I haven't ever had trouble getting all my stuff into the 30s. No helmet, though. Looking at the thread someone posted above with photos of the bags on a bike, those look to be the 40's. Mine have the same profile, they just aren't so deep.
I love the look of the X-plorer cases! Don't like the price so much.
I didn't get the tail rack because I foolishly thought I could adapt the OEM tail rack that came with the bike to work with this system... not. Anyhow, I've done fine without a rack on the tail, so there.
The new placement of the rear turn signals is pretty lame, but what are you going to do? They are right where you want your bags to be and you gotta do something with them.
Bottom line, they work great and look pretty slick. I'm going to keep them.