I flew the Vanguard at Air Bridge.(Not for very long and never liked calling it anything else btw)
Some things I remember about the Smiths
1/ A lot of people struggled to get through the course because of it.
2/ You had to be really pedantic setting it up for an approach and there were little chants associated with it....'Pitch Up Sense across..?'
3/ Situational awareness was a bit tricky using it.(on my line check I took off from EMA for Cologne and initially after take off lost my direction for a...short....while (just couldn't find south)until after hunting desperately round the cockpit for something familiar I managed to ease the tension and remove the trainers bemused stare!
4/ On an ILS it could show fully centred while the aeroplane was actually curving on to the ILS.
Is that about right or is my memory as cr*p as is usually is?