Stacks are definitely hard with squirmy pups!
The good: Sturdy looking female with good bone and a nice dark mask. Plus she is a sable so that is like bonus points for me She has good angles front and rear and her rear feet look nice and tight.
The bad: Flat withers and slight roached top line that makes the croup look very steep. This is quite common. (my own dog has a similar top line).
Front feet could be tighter.
I wish you had a better picture of her face so I could see her ear set.
I agree with Rob. Pasterns look long but she is 5 months and will be out of proportion for the next couple of months. Front looks east-west. Nice bone, nice deep body, very healthy looking. Flat withers but that may be the stack. Wait 3-4 months and come back. She will be a different dog.
Location: From England but have been living in New Zealand for 10 years
Thank you so much for the comments, I will definitely keep posting pictures as she matures. I do have some photos of her ears! they are on the "welcome mat" forum for new members under "hello from New Zealand" I've tried to add a link, hope it works...