Mould King 26002 Great Ball Contraption Marble Run Building Kits, Roller Coaster Construction Blocks Toys with Hyper Speed Motor, Gift Toy for Kids Age 8+ /Adult Collections Enthusiasts(2438 Pieces)

HAVING TROUBLE INSTALLING TRACKS, OTHERWISE GREAT IDEA AND KIT!

Instructions were clear and easy to read and build with. It’s a cool design watching the wheel shoot the balls around the loop! Track did take some fine adjustment get setup just right.

I enjoy building Legos a lot; while this is a clone, it's a surprisingly good one. I've had other clone sets and by far this is the best. The quality control is surprisingly close to Lego and it did not reduce the build experience. Sure, this GBC MOC isn't perfect and it requires refinement...this does not reduce the quality and Legos would have the same issues. Hands down this is the best bang for your buck. IMHO, I think Legos are raising prices on a lot of items just for the sake of it or popularity.

The main problem that makes this product unusable is that the rails the balls travel on have to be individually cut to size before installing. This information is not included in the manual. Included in the set was 46 rails in four sizes yet what is required is 78 rails of about 60 different sizes.Some other comments:-stickers for motors missing.-No easy way to contact seller. Note that the seller does not seem to be the manufacturer.-some of the manual instructions have typos...such as cutting rails to centimeter length instead of millimeter length.-some of the instructions are not clear.... such as no instructions to cut rails.Close to 70 extra pieces of all shapes and sizes.... this made me keep reviewing my work to see if I had missed something.Bottom line...if the rails had been properly cut and marked, I may have given it four stars.

Great build, excellent quality as usual from Mould king, no missing pieces from the manufacturer, but the seller when packing, forgot or lost the stickers and rubber band included with the model. This Reached out and the seller immediately responded and did replace the missing part, it did take almost a month coming from china. Luckily the part missing did not stop the build. Overall great product from Mould king and a new fan.

Towards the end there were several pieces of track missing, unable to finish, directions were unclear and things were unlabeled. Very difficult and not worth the energy

I am near expert with brick model builds, this is "the" worse set I have ever experienced. The track is too sensitive to support the marbles, the motorized wheel shoots the marble off the track and never in an upward direction. It's poor engineering, the infrastructure is week.You get what you pay for with little value.

Inaccurate instructions, tracks that need to be cut to dozens of different sizes, and horribly difficult to put those tracks on in the first place (and pray they actually stay). I was 95% done with putting it together. But now that I've reached the actual tracks, I think I'd rather just return it.