Solid car. Arrived well packaged. A plastic case on wheels with top and side handles is very convenient for transporting the instrument. The tool arrived filled with oil and within 8 hours of use there were no leaks and none of the screws/bolts came loose. Use it horizontally and also lift it 3 feet off the ground to the top of the knee wall that needed to be ripped off. Start in a small area, establish a fracture line, and gradually push away from it. See where the cracked concrete leads you to new weak spots instead of trying to "push" the tool through tough spots. The bits should slide freely in the chuck (a little extra lube helps). If the motor spins but the bits don't "knock," lift the tool and move it around, knocking so the hammer engages the bits. (This also occurs with larger industrial machines from rental shops). An 8 inch thick, 3 foot high 80 year old concrete wall was within the capabilities of the tool as long as I took my time and was smart. Nits The wall was filled with large stones (in addition to the fine gravel in the concrete). The hammer won't break through these granite boulders. I had to work with the concrete around them. Given the amount of work I'll have to do over the next year to remove concrete (foundation wall collapse, driveway) as part of a barn renovation, if this tool continues to work as is, it's a deal. Time will tell, but as far as first impressions go, it's good value for money.