Purchased the E7 Premium Walnut Desktop (120W x 75D) with a Black frame.
Installation was easy with clear instructions, but I would suggest using an electric drill for a faster installation time.
The motor is very silent and adjusts the tables' height smoothly. It is also very precise, which allows you can get your desired height down to the millimetre.
Overall, the experience using this adjustable desk was enjoyable as the features (smooth motor, preset height function, and anti-collision function) are well worth the money.