Quality construction, very easy instructions for installation.  They include a guide card that makes it a snap to place the base in the proper position before you screw it down.  The front of the unit is clearly labeled so if you install it backwards it's only because you can't read.  
I wouldn't want to install this without my cordless screwdriver, especially the screws in the back of the cabinet.  If you don't own one spring for the 20-40 bucks and get it before you install.  I had well made custom cabinets and it even made my cordless screwdriver whine.  
All in all, the first unit installed in 15 minutes, the second in 10.
I was pleasantly surprised at the ease of installation, the clarity of instructions, and the very few parts to deal with...base, rack and 10 screws.
I felt I got my money's worth and then some, highly recommended for the inept like me!