Anyone trying one of these things?

Sequential Shift Light Features include:

New and improved for 2003: all in one shift light with combined unit and display.
New compact small case; only 62 x 30 x 25mm deep.
Digital filtering (easy connection to any ignition system).
Magneto option selectable in menu (ideal for karts).
Built in 3 stage shift lights.
Selectable shift light flash (all LED's can be programmed to flash on and off rapidly when maximum programmed RPM is reached).
Selcetable shift light LED switch off time (save battery power on total loss systems, avoid eyestrain in helmets or if at maximum RPM for a long period of time).
Selectable shift light LED brightness (this allows a 4 stage selection of shift light LED brightness to avoid eyestrain if using the helmet shift lights).
Adjustable backlight brightness.
Button built in to label (flush, can't break off).
Selectable switch function menu.
Engine logs x 3. (it is now possible to see how long you have gone over your programmed RPM with this new feature i.e. your shift point is 6500 RPM, you want to see if you go over this parameter and for how long you program your 3 engine logs for 6600, 6700, 6800. When the engine RPM goes over the programmed RPM level, the time is acumulated and stored in 10ths of a second to a max of 1999 hours).
1-16 cylinder engines, 2 or 4 stroke.
RPM to 39,000 with peak recall facility.
Sequential Shift Light comes complete with loom and all fitting instructions.

http://www.spa-uk.co.uk/design/sequentialshiftlight.asp

It looks pretty cool, but was wondering if it is practical? Any comments would be much appreciated.

Thanks!