I have used them just to see how they work in a D-tools project and I know of other, who are not responding to your post, that also use the netzoom shapes.
They work pretty good in Line view and Elevation but will not snap to our rack shapes or display product ID's.
They have a 30 day free trial so give it a look.
Keep in mind we have allot of new shapes coming with the V5 release in Q4.