LEGO Technic App-Controlled Cat D11 Bulldozer 42131 Building Set for Adults (3,854 Pieces)

Another home run for Lego! Instructions are superb, almost without exception. There were no missing parts, and everything fit perfectly, though when marrying some of the larger assemblies together, you have to do a little finagling, but that should be expected on any model this complex. There was a moment of trepidation when the model was complete and I started it for the first time, but amazingly it worked perfectly!Yes, it is a lot of money but when you consider the amount of engineering hours that had to go into developing this monster and it's fairly limited market, plus the number of blocks needed to build, the price is really quite reasonable. You can trust Lego parts to fit together like they should without being loose or requiring a hammer and quality like that costs extra.This is not a model for the inexperienced or young and mechanical ability is a plus. Build time was about 26 hours - give or take - because I really didn't time myself.

The Lego D11 is an amazing Lego build hands down. It definitely ranks up there with one of the best builds I have done to date. It is a very technical build but not overly complicated in my book. The gearbox is amazing in how it works overall.The app does have some issues which has been reported by others. The fix for me was to uninstall the control app, install and everything worked as it should. Mind you, the original app install went through the testing phases without issue. The issue arose when the build was complete, and nothing would function. But as mentioned, uninstall and reinstall and you should be golden!

Nice lego

Fun and challenging build I really enjoyed it.

I have browsed the various comments and have seen mostly positive comments about this build. I think it was great. I received all parts and the build was a success. However, no one thanked the master mind of this monstrosity in any comment that I could see. So thank you Markus Koosmann for your efforts in the design, engineering, and whatever else you and your staff did to get this to come to life. Your will probably never see this thank you but if you do, much appreciated.Vaughn in Maine

Hard to make it but worthy to make it.Awesome piece

Awesome!

Super interesting to assemble, fun to play with (using the app), and it can actually be rebuilt into pretty much anything.

This is one of the best Lego sets I have built so far, it could also be a great gift, a little bit expensive, but if you have the budget, I recommend it 100%! Excellent complexity, playable, excellent way to spend time with kids and help them work their attention to details and motor skills!

Magnifico!!! Verdaderamente es un juguete maravilloso para adultos. Solamente para amantes de lo dificil y que valoren lo que costo diseñarlo.No apto para ignorantes.

El envío llegó en tiempo y forma. El empaquetado fue acorde con el tamaño y peso de la caja del LEGO. La caja del LEGO llegó en excelentes condiciones con sus sellos. EL set estuvo completo en su totalidad con todas las bolsas selladas. Todo original y sellado.Respecto al set, es toda una experiencia gratificante. El set es modular, por lo que una vez terminado es fácil de separar en sus partes. La experiencia de armado inicia con los motores y engranajes para todas las funcionalidades. Luego se arman los rieles latareles para las cadenas de avance. Posterioremente la cabina y el pico de excavación trasero y finalmente, la hoja del frente para arrastre de materiales.

It's a nice construction Lego set with 4000+ pieces. It was challenging and nice to build. All functions are perfect. Some motor functions are bit slower than expected, but that's how it is designed. I had one piece missing in the set, but since it's not a critical pieces I was able to continue building.

Todo muy bien.