Denti:
When flying a GBAS approach it is quite apparent that the approach is more stable and "smoother" than a normal ILS, especially if other aircraft are preceding on the ILS to the same runway, since there is absolutely no signal distortion and no need for any protected areas. It is more apparent when using the GBAS approaches into Malaga (LEMG) than in Bremen though. Malaga is still a trial procedure though, apparently certification of that installation had to take a backseat during the spanish financial crisis.
No taxiway protected areas to guard against signal distortion. But, all the other ILS protected areas remain with LPV.