My nipples are engorged from my 2 week old's struggles to latch on properly. I am considering buying those thermal gel pads but they're quite expensive. Anyone have any feedback on them?

Actually, if your breasts are engorged, it's better to relieve them by getting baby to latch on or by pumping out the milk. I bought Lansinoh's therapearl hot or cold therapy gel pads, but never go around to using them. A warm towel works just as well, in my opinion. Also, do learn how to get your baby to latch on properly. You can watch videos or seek assistance from a lactation consultant.