Thanks coffeeguy, Mine is EM6910, so not as fancy as yours, so I reel its not too bad for people operate it if they know what they are doing (or they thought they know). Personally, I don't think its difficult to operate EM6910, but difficult to make a good espresso with a proper amount, proper grinding size, and proper tamping. However, I am not the one drinking improper brewing coffee, so I am fine with that. ( and I dont think you can really damage the machine if you operate normally, right?) The only problem I have seen everyday is the cleaning things. People left the coffee ground everywhere on the bench, did not clean shower head or wipe the basket. Most terrible one is left the whole brewed coffee in the basket on the shower head!! That really happen in our school/research center next building, the rule of using machine is "clean the machine before you use, then left the rest to next"... What a terrible way. Having say that, I have been stopped by a staff on that building when I operate the machine during a workshop (of coures, before I brought my machine to uni). She told me if I have not used this machine before, don't touch it. I replied, I have a Em6910 at home, (she seems like did not know what I am talking). She gave me a "eye" anyway. Maybe she thought an Asian should not know how to use that machine. (sorry.. a bit racist here). I would like to make my voice stronger to correct the wrong about people not paying, but as a non-English speaker, sometimes I feel its difficult to make sure if I express myself clearly without offending others. Well, always good to learn to cope with different culture tho. I believe I will learn some lesson this time.