Paris is very flat. There are some very slight inclines / declines (the Champs is a slight downhill start for example) and the "biggest" inclines are going in and out of the tunnels - but they are very short.
Ahh, toilet facilities - the very glue that holds this thread together. There are toilets at the water stops, usually a short line to use them. Not sure of your gender, but most (males and females) disappear into the bushes along the course. At the start, there are essentially so few that there basically are none.
Food - they supply fruit (oranges and bananas) - but you are best off to use whatever you train with. So if that's gels, take them with you.
My experimentation on the anti-gravity treadmill continue. This is a cutback week for me (40 miles this week), so I had a short 6 miler today and decided to make it an interval session - was able to alternate 8 min miles with 7 min miles, very happy with that.
Weedy - no progress to report yet on my 4 min mile attempt, but stay tuned
The day finishes tinged with sadness at the death of Nelson Mandela. I am proud and privileged to have been his countryman. Comrades will be a little more special next year.
RR - I think the battery life is rated at up to 10 hrs in training mode and 6 weeks in watch mode.
i had not mentioned the Recovery feature. About a mile or so into a run it tells you how well you have recovered since your last run, and at the end if a run it tells you how long to rest before your next run. Interesting, but will likely be ignored as I have a schedule to keep!