A couple of months ago (yes, this is a super late review), I decided to buy the Logitech MX Vertical and this is my review.
Logitech MX Vertical Advanced Ergonomic Mouse, Wireless Via Bluetooth or Included USB Receiver (Renewed)
Logitech Lift Vertical Ergonomic Mouse Review: Refined and Customizable - TheStreet
Logitech MX Vertical Ergonomic Mouse Review
Logitech MX Vertical Mouse Review - CGMagazine
Logitech's Lift is a vertical mouse that's easier to grasp
Logitech's vertical mouse could save your wrist
Logitech MX Vertical Ergonomic Wireless Mouse
Logitech Lift Vertical Ergonomic Wireless Mouse - Graphite; Left Handed - Micro Center
Logitech Lift review: A small vertical wireless mouse for the masses
Logitech Lift vs MX Vertical Ergo Mouse