Well now,I don't have an FEC 500,but there are times I would love to be able to justify one.
I had a Smokette for years,and used it as a warming oven and a portable cooker in a pickup,or SUV.
It is difficult to ever get rid of one.My sons run cattle operations over a large area and they haul it where ever they go.It requires zero supervision and feeds a crew on site.
MY cs 160 is a 1996 model and I often tell folks that I could train a chimp over a cell phone to cook large meats to feed 50 workers.
We do cook a lot of comps and given a choice, I'd use the 150 to cook my large meats in them,and use it as my holding oven.
Now,we've used most series of Fast Eddy's100 since they started making them.
We cook steaks,pizzas,porkloins,a pork butt,a brisket flat-or packers.We use Stuart's method to cook catfish fillets,or trout for the two of us.Works great for a couple lbs of Johnsonville sausage.At comps,we do sausage, biscuits and gravy for our couple neighboring teams.
We like it for a pork,or beef tenderloin.Great the night before comps.
Naturally,we do a slab of loinbacks,altho we personally prefer St.Louis.
Easy to do a half dozen pieces of chicken for dinner,a brined turkey breast,or a 16 pounder for a holiday for 4-5 of us.
I guess I'm talking about the cook.If you can cook on a $200 kitchen stove,you can do it on an FEC 100.
Now,I do have a couple extra FEC 100s along with these others and a PG 500,that I might work up a swap to get that ol' worthless FEC 500-just to get it out a' your way.
Hope this helps a little.