I like it a lot for the following reasons
1. Completely consistant, every start is the same, you get tuned into the countdown pace and make cleaner starts.
2. It is very easy to see. Not a problem for the younger ones, but some of us older gits do not have the sharpest hearing anymore.
3. The lookback facility is clearly a much fairer/factual way of dealing with time disputes for all concerned.
4. The timekeepers do a fantastic job and this system will definitely make their lives easier
Any new system will have teething/user familiarity issues, these will quickly become but distant memories with use.
Battery life seems to be an issue for all day use, but standby/booster packs are quite inexpensive these days.
Good job Jim!