Hi,
Since you asked:
At Strathaven we use QFE, except when the pressure is very low and have to use QNH - we are 847ft above sea level.
This was in other threads about Loganair in the Orkneys/Shetlands being unable to set even QNH on their alitimeters in very low pressure.
The principle of QFE is also handy with students learning to fly from grass fields without towers etc and needing to build situational awareness of what circuit height - 500ft/1,000ft above ground level - looks like. Just makes it simpler than trying to fly at 1,847 ft or whatever 847 plus 500 is!
Very best wishes,
Colin
ps I had one student who was almost innumerate. His coping strategies were amazing - and his prior preparation puts any other person I know to shame. So you don't need to be able to count and calculate in an open cockpit to be a pilot.