Hi, I just wanted to throw in my two cents worth..  I am just now really getting back into the hobby after a multi year absence, I had built two Planes back in the mid to late eighties, a Sig Kadet MKII, and an Airtronics Jetfire 40.  I had covered the kadet using Monokote, and had trouble with it laying down w/o wrinkles, but I chalked that up to inexperience with the Iron on coverings. However, about a year later, I built the Jetfire, and covered it with Coverites Black Baron Film, and after using that stuff, I had decided that was what I was going to use from then forward. It went around the rounded wingtips wrinkle free, stretched when needed, and Shrunk when needed..   I believe that I could lay it halfway around a baseball wrinkle free, if need be.  I will probably be finishing a model in the next few months, and I will try it again.. 

as far as strength..  I had a Rossi .40 mounted in the nose if that plane, and it went in straight down, at full throttle..  when I brought the "Remains" back, everyone at the field wanted to know what covering I used, because the wing had a very Pretty Plastic bag to carry all of the tiny parts home with.   It didn't shatter, held together, everything inside was destroyed, but the covering was nearly completely intact, and that did impress me a lot.

I don't know if it's as good today as it was then, But I will definitely try it again for its ease of use, and strength.

Craig.