We were transferred to Vermont and our case couldn't be any more straight forward. There is nothing complicated whatsoever about it. Married for 6 years with a daughter. Husband and daughter are American Citizens living in Canada with me (I am a Canadian Citizen, my daughter has dual and my husband is a Permanent Resident of Canada). No criminal records, no previous immigration applications, no over-stays on visas, etc etc. It's just me who needs the visa to move to the USA.
I think the hardest part is never knowing why things happen with our applications or how long it will be.