My dog is a heavy chewer and destroys everything. He was 6 months when we got this and he weighs about 55 pounds.He did not know what to do with this toy at first. He soon figured it out and he LOVES this toy. He brings it to me to turn it on. Definitely worth the money. It lasted about 6 months. I paid $60 for it. So averaged out to $10 per month. Compared to other toys or chews that is worth it to me. I also love the interactive mode. It will automatically move every minute or so to keep him engaged. It’s also funny that he has figured out that my phone is what controls it. He brings me his bone, looks at my phone and then back at his bone.Downside is that the battery has not lasted as long as I would have expected. The charge only lasts about two hours at most. So I have to charge it often. Now, 6 months later, it only holds a charge for about 20 minutes at most. The blue tooth only works if your phone is in the same room as the bone. That is annoying when it’s set on interactive and I need to go into another room and carry my phone with me. It disconnects.Overall, I’d say it’s worth the money to keep my butt head dog entertained for about an hour at a time.I just bought another one today and it was on sale!Product works as advertised .. dog wasn't sure what to do with it at first .. but .. once it started spinning and moving around she started to play with it. Out cattledog is a moderate chewer .. after a few days .. you can see bite marks on soft end caps .. but .. they can be replaced if needed.Only issue we found is finding chargin g port ... documentation could written a little better to explain how to remove the protective cap.I couldn't get the wheels off but the dog did it and wrecked the toy in 5 min. flat.The front has fragile plastic components that WILL break off into sharp pieces. Do not buy this product unless you have a SMALL dog.Not worth the money!I wore him out playing with this non-stop. He doesn't play with anything else for more than a few seconds. I had to buy 2 of these so my other dog could get a chance to play.I thought it was a great product. It was easy to use and I thought it was a lot of fun. Unfortunately, my dog did not. I just could not get her interested at all.My 70 lbs Staffordshire Terrier /German Shepherd mix played with it about 3 times for about 20 minutes each time. I expected him to chew through the wheel covers but I didn't expect him to be able to break the hard plastic under the wheel cover.I have 3 full grown labradors and they enjoy chasing this toy around. So far they don’t chew it or try since they feel the movement if it’s picked up. Have some space that is flat to use. Application gives nice preset moves. Just wish the sound came out of the unit and not the phone. I get looked at making weird sounds and then they go after the bone. Battery has held up for at least the hour I fully use it per day.