The problem with stackmat timers is that they were made for speedSTACKERS, not speedCUBERS.
This timer has everything a cuber could want*, but it has a different start/stop mechanism so you cannot use it for competitions.
*
-Scrambles for 3x3x3 up to 5x5x5. for 2x2x2, just use 3x3x3 scrambles
-Inspection time, can be configured or turned off
-Storage of 5000 solve-times
-Average of 5, can be configured and can drop/indicate highest/lowest
-Can connect to a pc or tournament display
-Built in software can be updated.
I really like that timer and regret it is not the official one.