Anyone tried holle or hipp for baby???

So im planning on feeding my 3 “ week baby formula soon since my milk is going down and i was only able to pump and bottle feed her that milk ..i heard those formulas Are the best formulas but i live in the US so i have to order online ..What was your experience with your baby taking one of those formulas?? if u live in the us which website u purchase?? I notice they comes in a small box and i was wondering how long they last??