First of all the watch is very stylish and discrete so you can wear it with your normal clothes without it looking ridiculous. I agree with one of the previous reviewers that the contrast could be better, but on the other hand it is part of the discrete look since the watch becomes very dark. I have however not had any problems seeing the info on the watch so personally I don't think it is a problem.
The belt is pretty comfortable and according to Suunto it is compatible with some other brand exercise machines (great for you who travels in work and stays at hotels with gyms).
Why they don't bundle the M5 with the movestick is a mystery, it's very nice to be able to upload your data and have a overview of your previous exercises.
And according to Suunto you will be able to upload your own exercise schedules to the M5 via movescount.
Probably just another way to squeeze out another 30£.
I like the possibility to add a foot pod or GPS pod to the watch and seems to be the next step when you are ready to take your running to the next level.
Well worth 4 stars and I will update the review later on as I will buy the movestick and probably the foot pod.
Edit: There is a way to change the contrast in the service menu, so that is not a factor/problem any more since you can set it anyway you like.