I have 3 shurflo's, they are used 5 day's a week 6 hours a day,
and in my opinion they are the best by far, it is true switches are rubbish
but i use my own switches, john's backpacks are well worth the money
but if your planning on using every day all day has to be shurflo.
PS if using on your back, but if your going to put on a trolley go for john,s.