I took the CLD exam online last week and wanted to post about the experience for the benefit of others. The online exam is a great option if you cannot get to an exam centre, but it is not without drawbacks. The person monitoring me had to be very attentive as it is much harder to prevent cheating in this type of set up. My observations are below. I have tried to present them factually and make my personal comments obvious. After this experience I would consider taking an exam locally if the option was available, but if I have to travel to Newbury (only exam centre in the UK) then I would pick the online option again, particularly as I now know what to expect.
Setup - The invigilator tells you what to do through the Live Chat.
During the exam
I hope someone finds this useful and I would add the caveat that this is a sample size of one and your experience will differ.
I took the online CLD exam about a month ago and I share your experience. I was great I had the option since I had to take the exam before the end of the year and there were no venues offering it in my vicinity. In the end I passed the exam but I think I could have performed better without the added stress from the technical difficulties.