A choice with rectal cancer operation

Hi all, my wife has had chemo & radiotherapy last year for rectal cancer. Unfortunately, a centimetre of the tumour remains 

she has been given the choice of having a temporary ileostomy bag ( for around 6 months) or to have a permanent colostomy bag. We have heard and read , that ileostomy bags are very difficult to manage. Lots of changing and problems with them. Anyone had that experience please?

many thanks 

Martin