The problem would be, times of Quarters (Football) should change. So you should even play 4x11 minutes, this clock would not manage to because the default functions do not permit a change.
Work on colleagues (Football) with the Play Clock (40/25 seconds): there is a separate timer, where you can adjust itself. However, can not choose between the two variants is. You have to find his own attitude, which fits an as with any clock. I work in principle with just 25 seconds. This I pay five seconds after beeping time to give the signals for the last 10 seconds and no longer needs at the clock.
Pro / Contra at a glance:
+ Many preset countdown times (in minutes!), Which facilitates the changing enormously
+ Time very readable
+ For the holiday useful, because you (depending on what time zone) can set the time zone with a few clicks. Rome, NY, Dubai, LA, Moscow, London, ....
+ When the countdown time has elapsed, the clock will beep and then run up again. For football referee certainly convenient (injury time).
- Preset countdown minutes can not be changed (for example, instead of 12 minutes for 11 minutes)
- The clock reveals a very very quiet that you have pressed the Start / Stop button. Depending on background noise at the box requires a visual inspection. Maybe then this second is absent in the concentration at the field.
For me fit price and performance. Weaknesses of the clock as mentioned above.