to those that say you shouldnt decend on the glideslope due to false lobes, I agree but only to a point. What about ILS approaches into wacky places- Kabul international springs to mind, where every approach you recieve will be down a valley where the only certainty of "getting it in" is in decending on the glideslope. If you think 500' is high, I sugfgest you shoot an approach and see what 3000' high on the localiser decending off a talkdown from the co to intercept the glideslope is like! Would definately not do it on my IRT, but if going around is a bit difficult, a little MDR (300' per mile for 3 degree) will confirm whether you have captured the upper lobe or not. Oh, and the fact the upper lobe is usually found at twice the ILS glideslope, which means your approach is far steeper.