Bought this as a stocking stuffer at Christmas for my girlfriend. We're kids stuck in adult bodies. It's smooth, easy, and fun, for beginners and experienced alike. The two hemispheres come apart for easy access to the string if tangling occurs. An extra battery is provided if the battery to the LED lights should die. The ball bearing axle keeps the yo yo spinning well while in the down position, so tricks like "rock the baby" and "walk the dog" are done with ease. I did both tricks easily without having done them before. My girlfriend is from the Philippines (where the yo yo was invented), and can do more intermediate tricks. She puts heavy use on it and it's holding up fine. We leave it out, and everyone who stops in will pick it up and have a go at it. I love that it lights up. It gives tricks a little extra kick, and makes outdoor use that much more fun (in the evening).There were a couple of downfalls, but nothing serious regarding the yo yo's operation. If I were a 12 year old, instead of an adult, I would be VERY unhappy that it came in a transparent yellow, and not the clear plastic. It still looks cool, so no big deal. But, if I were 12, I would be down right angry about one side of the yo yo not lighting up. I changed the battery, however, it seemed to be a defect in a metal piece that wasn't completing the circuit to the battery. If we held it in place, it worked. The defect is nothing to worry about, Duncan makes good yo yos and I have never bought a defected one in the past. Even now, the defect doesn't affect the performance, and I could of had it replaced if I cared enough to.It gets a lot of use, and praise. We will be buying another when this one puts its best days behind it.