watmekiasu:

Altho my own child is using a Chiropak ergo bag, I recall reading this article in the ST some time ago that gave the highest points to Lego and Deuter for comfort. Mind you, that article was like 2 or 3 yrs back. They tested out Deuter, Lego and SPI. Not sure if Impact was included.

Just bought a Red/Pink ergonomic deuter bag for my daughter. there's a 20% discount at OG Orchard, so the bag comes up to $96. The bag itself is so much lighter than her older school bag, so this is a big plus!
It has a lot of compartments too, so useful for my daughter.
Personally i would prefer to buy Deuter than Impact and SPI, as the brand itself is reliable. My 2 cents' worth.