Just adding my two cents.
I was renting a small cottage and the kitchen had been revamped and the landlord put in an integrated washing machine and dishwasher. The washing machine was only about 4/5 years old and it broke 3 times during the 10 months I lived there. This washing machine in particular (I don't know if this is the case with all integrated washing machines) had no filter so whenever there was a problem the whole machine had to be taken apart, kitchen got flooded three times (each time it broke) and after the first time it just never worked properly. They're generally narrower so there's less room for all the parts and a filter seems to be seen as non-essential. The dishwasher also broke twice during those 10 months, water flooded out into the kitchen, the dishwasher was only a year old.
Neither of these were being over-used in any way, I lived on my own so dishwasher was on once or twice a week, washing machine around the same.
That's just my experience, good luck with whatever you decide!