"Do they fly like a field point"
Yes and no. They do if you get all the wobble or run-out you can out of them, and act a little squirrely if you don't. When I first tried mine I was amazed, then launched a bench rested test shot into the ozone off aside of target at 30. Got to doing some serious wondering/checking and found a few I had put together were wobbling pretty bad. Couple of lessons learned here for me, thankfully before I boogered any deer up. There's a little washer goes on last in assembly that you merely loosen head and spin the washer, then retighten TIGHT and usually w/ a little effort and alot of patience the FEW problem ones line up perfect. Don't ask if it's the head or the arrow insert cause I have no idea. Here's a deal I made out of an arrow straightener to check them, apologies to the old guys for reposting this pic, but we got so many new people here it keeps coming up. You don't need to go to this extreme but if ya got one of these it's simple to reconfigure it like this: