Mitre 10 kitchen in place for the past 8 years. Only issue I've got is that the cupboard door hinges sag over time and use, particularly the double door corner cupboards that have two hinges. Doesn't overly bother me at present. May, at some point get round to sorting them out.
Self installed the whole thing including cutting the holes for sink and cook top. No major dramas for anyone who is reasonably handy.
Drawers still run smoothly. Shelves don't seem to have sagged/bowed at all.
Wouldn't recommend their budget appliances though (cooktop and oven).