JWs are like every other people with the exception with being controlled by GB. What I mean, there are good and bad, truely humble and truely haughty. You can find these people everywhere. Spouses fall in a same category, some will be better than others and few may not be totally controlled by GB as others may be. You will be treated well if you go to KH but you would also be treated in a nice way by other religious group who meet in a small groups.
Problems usually surface if you question the leaders (GB) and when you state your opinion on the BS that WTS teaches. That is when the witnesses will start viewing you as an opposer or an apostate thanks to GB indoctrination. A spouse depanding on soundness of mind may prefer the advise of strangers(GB) to that of his/her unbelieving spouse. That is the cult mentality that you will notice. I guess Roman Catholic church would have fallen in the cult mentality in the middle ages where you would be burned at the stake for questioning the pope of church and that is similar mentality that prevails within WTS religion.
Hopefully what I wrote above is a fair description of "JW"s which aren't that much different than others really except when it comes to question their beliefs and their leaders.