@Ellee_Sanderson It's amazing ! Tips ? Have a few days altitude acclimation. Do some hill walking training before you go - it was really noticeable that the regular hill walkers in our group found it far easier - was a much better indicator than general fitness level.
@missblaireTO @MsBelleConnolly A UK SP gave you a number to put in that field. It actually encoded length, time, date - so 4hrs at 1900 on 04/03 would be 419000403. She was clear you only put that in ! Always thought it was a great idea for both parties.