This is my first build of a 3D printer. I thoroughly enjoyed putting this kit together. I've printed several objects now, and all came out fine with a minimum of tweaking.
I can't overstate how important it is to square up your frame as you build the base and also when attaching the uprights. A little extra effort here will prevent a lot of grief later.
Remember to lubricate ALL of the linear and axial bearings! If you forget, you WILL have to disassemble parts of the unit to get to them and, of course, realign the unit again.
Be aware that the Z-Axis motor mounts are also used to help stabilize the frame uprights. Make sure the motor mounts are butted up against the frame to increase strength and stability.
The auto-leveling sensor is a great feature! It makes it so easy to prep the bed for printing.
I could go on and on, but suffice it to say that this is one nice printer for the money spent. Easy to use, low maintenance, and full of features.