As for the queue jumping, the people with Q4U wait the same amount of time as they would have if they were in the queue and are also paying for the service of not having to stand in line. There is a limited number of units available each day and hopefully this number would vary depending on how many people are in the park on that given day so that there is a balance between virtual queuers and those standing in the line. I was there the week between Christmas and New Years with it in effect and chose not to buy it and managed to get on each ride at least once and that was in peak period. Not once did I think that people were jumping the line when I saw them go past. Infact I might actually get it so that I can fit more into my day next time I go.