I don't mind it all...I know it is their airspace so I try not to disrupt if I'm going through when hot, which is rare for me. I had ADS-B traffic showing on my iPad so I could see the movements and altitude changes and move enough to de-conflict when necessary. I've gotten into formation flying the last couple years too and thought it was cool to see the flight come around on me, although they didn't get very close.
I figure I'm paying for some of their fuel, so I shouldn't have to pay for extra fuel myself to share the space. I don't do it often, but on a clear day I don't see the problem, especially when the alternative adds a lot of time to go around...there are parts of the country where they occupy a lot of airspace. I had the ADS-B going and was talking to their controllers as well. They were T-6 flights of two, so they weren't going so fast I couldn't see them like might be an issue with fighters up for some play time.