Hi everyone. I have a Jawbone Up and love it

. I credit it with keeping me on track and being successful with the 5:2 WOL. The food, activity and sleep trackers are great. I track my calories every day. I can use the trend feature to show me clearly why I have lost (or not) each week by adding up the difference between calories consumed and calories burned each day.
The idle alert is great although it makes me jump when I am in a long meeting.
I am not sure about the typing giving false activity but I don't type that much in my job.
The Up has to be synced manually by plugging the band into my iPhone but I don't mind that as I am there using the app to look at data, enter food etc. It also means it has a longer charge life (8-10 days) than the FitBit Flex which syncs wirelessly.
I did a lot of online research between the FitBit Flex and the Up bands before buying but ultimately it came down to this:
the Up was in stock, the Flex was sold out.

All the reviews suggested to me they were both good so I am not sorry.
Hope this is helpful