Speed Stacks | G5 Stackmat (Timer and Mat) | Accuracy to 0.001 seconds, batteries included | Endorsed by Sport Stacking and Cubing associations

Perfect for someone wanting to learn to cup stack. My son loved it. Makes it easy to take places!

I love this mat, super excited to use it

It arrived quickly and my kid loves it. It’s like the one they use in his school comps. I can’t speak to longevity but it does the job.

Purchased for our son who wanted to check how much better (quicker) he's becoming at solving his different cubes. flexible/comfortable mat.

Work very well. I gave it to my 14 years old granddaughter who saw some competition of speed stacking. She was so happy and started to play right away. At first when I received it, I was a bit disapointed,it really looks like a toy for a small kid . But my granddaughter was very please with it and started to show her skills to the whole family with proud.However I give only 4 stars , because I think a little bag would have been nice to hold and keep the mat and the timer together.

My son has been really into speed stacking and so far using a phone to clock the time has been fine. However, this device is more accurate than using the phone. He absolutely loves this and has helped to bring his time down. A must for any serious cuber.

My grandson had requested this for Christmas. He doesn't stack, but he uses the timer for how long it takes to correctly put back speed cube puzzles (like Rubic Cubes). He was very happy with it. 5 stars for grandma!

I use it for teaching Sportstacking to elementary and middle school students. The mat helps to mute the sound of the cups so that the students can hear instructions and it protects them from cracking.