I find Hand Me Downs great for toys and books etc, but their DVD's are far too overpriced, they usually charge $10 and considering how cheap you can buy new ones for I don't see that as a bargain. The clothes are OK but as they get into the bigger sizes the quality gets lower and I often find the prices a little high.
I have usually been quite happy with their customer service but the last time I shopped there (about a month ago) I was disgusted. I was referred to as "Hey, woman with the baby!" and was otherwise offended during my shop. Lead to a very dissapointing experience and I am not sure if I will return there considering there are many other great second hand kids shops around melbourne.