We need better manual. Robot is very strong and good designed. At start we struggled to how to assemble but thanks to help by email. We managed to finish & program. Now works well.

Gives robot very high weight. We liked the quality and machining. I hope to order more soon.

After these motors we stopped using other brand's motors. We definitely recommend it.

Can be used for 3d printers? Are there any information about that=?

My team loved the chassis. with square nuts, assembling was very easy (we were afraid for tapping, drilling). Actually still we are working on that but we finished lots of assembling. Very good start point for sumo robots.

Easy to assemble, comes with bunch of screws, SG90 servos and motor plastic parts.

My suggestion is make a how to videos. The information at book are very valuable, but lots of people needs deeper desctriptions. We want experience videos! :) When you add some videos I will update my review from 4 stars to 5 stars. Thanks:)

Are there any other deal for Bipolar model? Not unipolar.

The motor is cheap and strong. What's more? :)

I am using this at Robot arm. 4 screwed hole makes easy to connect to any joint.