why..
why use QFE?
Flyin´in and out of moscow and russia everyday, using QFE is the easiest and best option to do.
1st: try to request local QNH from UUWW/Vnukowo approach controller on a buy day...., have fun - have even more fun and request an Altitude not Height..
2nd: try to find QFE tables for some inner-russian apts, where there are not even jepp. plates available and you have to use a navigator
3rd: use QFE to avoid confusion: all acfts and controllers around use QFE and Meters..., so if you are instructed to descend 400m and cleared approach on a 90° heading - i think it is not the correct time to check the approach plate head down and find the correct value out of three colums and recheck with the PM. just set 400m and fly the aircraft.
my 3 cents
welle