When they're fresh, they're awesome. The combinations may sound goofy, but I swear it works for some reason. If the fries or chicken tenders have been sitting awhile, they suck.
I've eaten 2 before. I think I can eat 3 if I push it. I'll try it next time I go for the fuck of it. There's no way in hell I could finish 4 and 5 is just crazy.