I don't use chicken breast any more, just chicken thigh fillets which turn out far more tender and are currently a similar price in AUS. They also seem to get more tender the longer you cook them, as opposed to the breasts.
I find that precooking as in the Curry 2 Go Youtubes with marinating overnight in yogurt, spices and GGP then cooking the next day with whole spices, onion and some base gravy gives lovely spicy aromatic chicken pieces.
One of the main benefits I find is that you end up with a good batch of "stock" afterwards that goes well in a lot of other dishes. Especially when I use far more onion than the 1/2 suggested by Curry 2 Go, it's almost like a dopiaza onion sauce.
For example the other night I got home starving at 9pm and boiled up lentils till smooth, then just chucked in dry mix powder, Kashmiri Chilli, a ladle of base gravy (the "shortcut" one posted by Curry 2 go) and some leftover "stock" from precooked chicken with a fair amount of soft onion pieces in.
Didn't bother with the "tarka" thing as the gravies had plenty of oil in, and it turned out a ripper dal and I ate half a litre of it at least. As SWMBO complained later on in the wee small hours

edit: and she will have revenge, I'm cooking her bacon bone and split pea soup for tonight as it's still winter here. :
