I have the Luggage Locker tail bag and I'm quite happy with it. I've had the the bag loaded with a gallon of milk, whole roasted chicken, 1lb tub of potatoes and 6 jars baby food with room to spare and both side compartments available. Quality canvas and zippers. As far as being lockable...I suppose it keeps the honest honest. I don't bother. Coupled with the Givi t411 throwovers; I've got all the storage I need for a several day trip.
