Is investing in a breastfeeding pillow a good idea? Is it really worth it?

I think it's worth it, sometimes baby just have to nurse at higher position to reach your nipples and holding like 5kg (1bag of rice) and letting baby feed is tiring. Alternatively you can also use a pillow to prop up your arms but just be careful and make sure it's stable (if more than 1 pillow). Some mothers are selling lightly used ones so if you are not fussy, get those instead.