"I know this is a retired product, but I thought I would chime in just in case someone has an option to purchase this second-hand. This is a solid, well-designed model and it was fun to build. the instructions were clear so there were few goof-ups due improper placement. The engineering that went into this set was superb. This is actually a 2-in-1 model and the instructions for the alternative truck are available for download on the LEGO website. I stuck with the tractor trailer model. Motorizing this would have been a plus, but the functions are easy to handle. Nicely done!"
"This was a fun build. It was challenging with all the gearing and one should always double check their work when there is so much complexity and interlocking (which makes it hard to go back to make repairs. I must say that for all the gearing and internal complexity, the Rover doesn't do much after it is completed. The most fun are the doors (side and back), the steering, the hood and the winch, THIS MODEL BEGS FOR A MOTOR. It would be so much fun if one could see all this gearing in action. LEGO should seriously consider a motor retrofit kit for this. I have recently built several Technics kits with motors and they are much more fun. Another point, it seems that a lot of builders have had trouble with the transmission (I needed to do some repairs...) so I think it would be helpful in the instructions to have some "in process tests" to make sure that things are working correctly before you proceed to much further."
"This was a fun build and the LEGO engineers are getting better at adding fun features to their Technics line. There are lots of details here such as the opening hood that shows heo Volvo engine in action. The technology that went into this model is incredible, the shear number of gears is amazing and the way that it all gradually goes together is a marvel to observe. As with any of these more advanced Technics models, be very careful as you construct it. Step 1 in this build has a lot of gears and if you do one thing wrong, it can be a real mess. At one stage, I missed that there were three red idler gears and I only put in one. When I finished stage 1, I had two gears remaining and I knew that could not be right. I went back and inspected and I found the error. It took 90 minutes to pull down and re-construct the model correctly. Step 3 is hard. Lots of small pieces and the parts that you would assume would be in the same bag are often not - so lots of searching through small pieces. The remote control through one's smartphone is really cool. The only drawback there is that the tutorial is a bit confusing to get through, but one you get through it, the truck has great remote control features - forwards and backwards in different gears steering and dumping. Kids will love playing with it. A wonderful build - just follow the instructions carefully."
"While I have built several LEGO Technic sets, they have mostly been the motorized heavy machinery type. This is my first car. The build itself was very satisfying. One needs to be VERY careful during construction, because a wrong placement of a piece can result in having to tear down the model in order to fix the error - so double check as you go along. With a set this complex, it is often difficult to see exactly where a constructed module is to fit into the model. I think LEGO needs on occasion to provide a more close-up view of where a piece or module needs to go. The internal construction is top notch. Everything interlocks so the model is rugged. It is almost a shame that so much of that ends up being covered up with the exterior pieces.
My problem with the set has to do with the exterior pieces. Pieces on the front and back corners are often only held on with a single LEGO "post." Given the weigh of the model, those pieces often fall off. While the rear end of the model is solid, the front end grille is wobbly and flimsy. My gear shifter seems to be jammed, but given that it only gets the pistons to move faster, it is not a biggie. In fact, for all the expense, there is not much to play with. Meanwhile, the Technic construction equipment (with their motors) are alot more fun. A great build, but not much to do with it after it is done."