I've found it ok, actually. I've had my moments when it's been difficult, but to be honest, the good days cancel out the bad ones. If your head is in the right place, CD is a breeze!!
You may find that you get a bit moody - i know I did - well moodier than normal!, because I think it's such an unnatural thing to do - not eating - it took a while for my head to catch on to what was happening.
But, i only did one week of SS - it was planned, so I moved to SS+ (i can't do it without eating something - it really helps me). I'm very happy with my losses. Also, don't go comparing yourself to others - we are all different and we lose weight differently. So no stressing out if you aren't keeping up with certain people.
And this is v. important - don't be tempted to jump on the scales every few minutes - it's not healthy and it will ultimately do your head in!!
Remember, people on this forum will understand what you are going through. Your family/partner may not... they will tell you to "eat something"!! We'll tell you to hold on and have a glass of water! lol
I'm sure you'll get on great with CD... the results are well worth it.
Lx