When I got Nantwich Town to the EPL and we needed a new stadium so I had to ground share with Stoke City. It was annoying because we got bigger crowds at Stoke than we did when we moved to our new stadium.
The annoying thing about it was that for the whole season, we were in the red. They havent upgraded the training facilities or youth facilities. They are "minimal". Its annoying. But at the same time, I am just glad to be going up to the championship. Now hoping to go to EPL!