I bought those from that same ebay listing, almost a year ago; Arthur. No problems, super nice guy. Easy-mounting c-bows, and the H&Bs do look tidy on the bike. I still like them. Came with the hardware, but to get the left pannier clear of the Agostini conical, I have the left side bag sticking an inch further out than the right-side bag. I used two of the original under-saddle pegs as spacers on the left side. It annoys the ocd-part of me, but I'll live. (Another Grisonaut at rustedchrome.com solved the same problem by dropping the mount on his Ago').
The panniers are too small to swallow a helmet. They have a removable liner and straps for that chic-over-the-shoulder look. They are holding their shape, but they are flexible. Zips are holding, the cordura-type fabric isn't wearing out. Won't stop a knife. I can't imagine one would survive a slide with 500+lb on top of it. Perfect for winter commutes, and weekend tours, but I did need a 35L dry-bag strapped to the pillion for the extra storage on a week-long trip to a professional conference. I'd be pressed to fit my usual down bag, mattress, ground sheet, jet-boil, pack-raft, paddle, pfd, plus tools, wet-weather gear etc. But I like the H&Bs enough that I would find a way.