hey roughstuff I didnt know that was you - yr website is excellent - I've used it loads of times
I agree with roughstuff - I've had karrimors (expensive, but so good) for about 3 yrs now, and have used them 6 days a week in all weathers (both commuting and touring - they never get a break). you can pick them up by the zips, seams, strings etc (sometimes it just isnt convenient to use the handles), and they NEVER break anywhere
the only con I've found is that they are a bit fiddly to carry, and dont have straps. other than that, they are amazing