What little I could find doing some quick Google
searches seems to indicate:
1. you need more scope
with a Northill (USCG Boat Handling text) so if you got one I think that is a fair assumption. Not sure how much more they mean though.
2. I also saw a post from a circumnavigator that had a 40 ft boat and used a 25 kg Northill as the main anchor
at first but found it tangled in it's own rode
easily when the boat did 360's and then switched to a Bruce. He didn't like it.
My own bias would think the Northill is not an easy anchor to work with and the reports I did find where people liked them were old very large anchors. A person on latitude 38 loved his 75 lb Northill.
Perhaps a poll
of the forum might yield a few anchor preferences but I'm not sure a Northill would be near the top. Modern technology I think produces anchors that set faster and easier.
You could also do a Google
search as I did and read some of the hits. I didn't find many that sounded positive.