There was a thread a while back about aldi washing powder killing the motor in washing machines.
i remember that thread, i've never had an issue with their washing powder, and ive had 2 different front loaders (just bought a new one, and we had borrowed a friend's one prior to that) and only used aldi front loader washing powder and fabric softener (cant remember what colour we used to use, but now we use the blue one)
anyways, never had any problems with using it and i've used it for over a year in total now? maybe it depends on the machine..

I love Aldi! *some* of their products can be abit hey how ya going, in the sense that they dont taste that nice (they may have changed now, but when we tried them, we didnt want them again.) but that was pretty much only some of the chicken sauces.

My dad is abit of a "brand snob" too lol, and he always says "Oh the homebrand at coles is cheaper/same price than these!" but then you compare the QUALITY to the price you pay in the shops. more often than not, you're paying Homebrand prices for the top of the line quality products, (which has taken him quite a long time to realise lol)

the way we work our shopping is we do our Aldi shop first, (cuz aldi dont always stock everything specifically we want) and then do the remainder of the shopping at either Coles/Woolies/IGA etc. usually it ends up that we do around 95% of our shopping at aldi, with only small remainders at the major chains.

i would however recommend to steer clear of their meats, as they are packed with preservatives.. :s DH's mum bought some mince from their once, and put it in the fridge, and forgot about it, and 1 week later, she saw it in the fridge, and it was still as pink as the day she bought it!

Other than that, we find Aldi is a godsend! we save SOOOO much money every week!