I have the same problems/out comes as Airguy mentioned. It will fly a GPS approach great, both LAT and Vertical... An ILS, not so much. It will hold the localizer fine, but has hard time tracking down the glideslope. I usually have to help it a lot and will hear and see (on screen) the pitch AP slipping..and it is cranked up to 100% torque. It will then lose the glideslope but its all over with. I pretty much know that on an ILS I use VS mode at about 600 FPM one the GS is intercepted.
Ryan Allen, CFII
RV7 N612RA, flying since july 2012
RV10 Tail Kit complete, Wings 98%, Working on Fuselage, AEIO-540 on the stand
Acro Sport 2, building