At the time I couldn't find chicken under $12-13 a kilo so it didn't seem to be ver economical to me. Recently however chicken breasts have regulary been on sale at fruit markets and butchers near me for between $6-7 and I have started doing this myself.
Usually on Sunday I poach a couple of chicken breasts.
So how do we use the chicken?
Sunday night I make chicken pasta salad for my daughter's lunchbox (or I have her do it). We usually make enough for a couple of lunches. The rest I turn into simple chicken salad - my version has celery and dill through it and we use that on sandwiches through to Wednesday. For about $4 we get the protein for 9 lunches which is pretty good value ie 3 days worth for 3 people.
Other ways we've used it:
Chicken bruchetta sandwich
Vietnamese spring rolls
Chicken and corn soup
Chicken and mushroom pasta
Anyway, it's an idea you might like to try for yourself.