Becoming somewhat paranoid about my tankbag scratching the deliciously shiny tank on the speed triple I decided to invest in a tailbag. My requirements were - easy to take off and put back on, don't want to take the seat off every time - water resistant - easy to carry when off the bike The majority that I saw used a plethora of occy straps, velcro, suction cups (ok I made that up) then I stumbled onto Kriega, liked what I saw albeit at a slight premium to ye olde oxford tailpack. It was a tossup between the US-10 (10lt capacity) and the US-20 (20lt), deciding that if i like it i'll probably end up getting a 10 anyway to make it a us-30 I went for the more practical 20. First Impressions... read the instructions to attach it. You need to slip the straps OFF the bag before you feed them under the seat. Once I had that sorted and the bag stopped wanting to jump off we were cookin' with gas. Taking it off/on is easy, 4 clips and off you go, the straps stay attached under the seat, however (and this is poor) you need to buy "Strap Keepers" seperately, theyre cheap ($10) but its not advertised and if you dont know to get them you'll be left with straps dangling down the side of the bike. What the strap keeper does is give you somewhere to attach the straps to when you want to go without the tailpack, but dont want take the straps off. The Bag itself... its damn big, tried it out by packing it with two beach towels and there was still some room. More than enough to take lunch, spare shoes, backup tapes etc to work, then stop on the way home and pick up dinner. The inside is white, making it easier to see whats inside which should come in handy im sure. Obviously it sits on the pillion seat, I can slightly feel it against my back sometimes but nothing uncomfortable. Definitely happy with the purchase, I'm no longer stressing about the tank getting scratched up. I like the fact that I can expand it to an additional 20lt (40 total for those playing @ home) which should be more than adequate for clothes, shoes and few personal items on longer rides. It should come with the strap keepers, even if the bag costs more as otherwise I feel you're not getting all the benefits of it. Bought it from Kriega Australia, happy with the process, quick shipping to boot!