Iodised water doesn't taste too wonderful, though you do get (sort of) used to it after a few days.
I flavoured mine with some oral rehydration powder (blackcurrant variety) diluted very weakly.
One more seasoned traveller, rather cleverly, brought some orange-flavoured fizzy vitamin C tablets, which worked well - even if it did look like the water had already been drunk once!!
A great trek, with some quite adventurous bits - but nothing too scary. The oldest member of our group was about 62, and he coped OK.
Do bear in mind that the first and last day are spent travelling, and that day two is partly travel and partly spent in a town (which I could have maybe done without), so the actual trek is really five days.
Nevertheless, you get to climb a quite impressive mountain, visit some pretty "oasis" towns, and explore numerous hills and valleys on a trek during which you are VERY unlikely to meet anyone outside your group, other than local people.
Overall, a very enjoyable holiday and I think it was quite encouraging that quite a number of the group had been on one or more Exodus holidays before and they all agreed that the holidays are well organised and good value.
THANK YOU EXODUS !!!