Due to the new update of grbl u will need to wire your shield a bit different than normal, to find the exact details you can go to nikodems youtube channel. Overall good quality not too hard to assemble (if you buy screw on terminals etc separately, they are not included as stated with the product). I had a problem where I didn't solder good enough bout you can check where the faulty solder is by using a multi meter and the github page of grbl where they explain what pin does what. My apologies if my English isn't good.
The indy shield came but it doesnt have the pieces on top like in the photo. Also the electrical documentation for this project does not include the spindle or the size of wires needed. I have spent a lot of time replacing plastic 3D printed parts on the indymill. Over all this project is good/okay but there is a lot that can be done to improve the instruction's clarity.