I decided to eat in my own neighborhood this weekend and finally made it to the Cheesesteak shop after working late Friday. They have cheese whiz! I asked as a formality and was pleasantly surprised when they said yes. They serve it in a little plastic tub as a $1 extra.
I had the naked steak sandwich with the whiz. I forget if the traditional whiz wit should include cheese too. Anyway, the sandwich was very tasty, hot off the griddle, beefy and oniony and not too grisly or lean. I hesitate to say that it was the equal of Geno's. There is just something about sitting outside Geno's, watching the boys in the hood play hoops in the playground across the street and being served by someone wearing a rabidly anti Mumia t-shirt (and on the company dime).
CS does have photos of Geno's, Pat's, original Jim's and South St. Jim's hanging on the walls. I did enjoy the CS cheesesteak more than South St. Jim's.
btw I would stay away from the Italian Hoagie, which I had the next night before going to a three hour French snoozer at SFIFF. It tasted OK and there was a lot of meat (copa, prosciutto, etc), but the provolone was nowhere sharp enough. And it ended up upsetting my stomach for the first half of the next day.