LEGO linear actuators

I've been recently playing around with the "new" LEGO linear actuators. They are pretty neat and mechanics can get greatly simplified thanks to them. Sometimes it removes a little bit the challenge, but it also increases the creative possibilities.

I created a simple 4-legged walker using 4 linear actuators to test their strength and speed, and I've to say I've been surprised at the quality of those actuators.  Here's a picture of the linear actuator in my robot:

And you can see more pictures and videos of it here