The standard anchor link with an id attribute causes a page to scroll down to a specific point, so the general behavior of jumping to a point in a page is well established.
Having said that, it can be mildly confusing because that case is much less common than a standard link that causes a page to open "normally" at its top.
I think the question is "how useful is it in your particular case?" If it's not clear why the page has scrolled (or jumped) down it might not be useful enough to warrant the potential confusion. Personally I find pages that scroll down a small amount (like 1/4 of a page) to be less useful since the targeted content would be visible if the page didn't scroll. (Of course sometimes you can't predict if the anchor link is close to the top of the page or 5 pages down.) The link I provided
works well because the pertinent heading is obvious and right at top so there's not much confusion - I quickly grasp why it jumped to that spot.
I think with fairly minimal testing you can determine whether or not the jump/scroll down behavior for your particular case is useful or not.