I upgraded my H with the RS module and it is a great addition IMO. I have only done minimal testing of the actual RS module, it dodged a tree branch and my truck and that is all that I have done. I have tested the indoor positioning pretty well, I really enjoy the stability in hovering that the IPS adds to the H. It does help outdoors when hovering too. If you are not going to be using the H with its automated modes I would say it is not worth it, unless you need it for indoor flights as well. It also decreases you max flight time by about 3-4 minutes.