[johnnyrod]

Know what you mean. I looked at one at Infinity m/cs the other day, a bit more like a holdall that sits across the seat, but it's mainly held on by a strap that goes under the pillion seat so a bit of a faff, plus some tie-downs. My panniers on the other hand have a piece that first to the seat and you leave it there, clips the bags on and off, much easier - pity they won't fit on my new bike hence the search for an alternative.