took five hours to build, fun to use and program. no missing parts, be sure to use a video of how to build, because there are no instructions included. 6gram servos, so not super strong, but works fine and uses little power (less than 500 Milli amps with one moter moving at a time)
it is a fun build, and i recommend it for teenagers or grownups. unfortunately, it's seems like the servo engines you get with this are not strong enough for the main arm. other than that, the instructions can improve, and engineering of the base is must improve (everything is standing on one small acrylic piece and two nuts).