Pros: Beefy, stiff, powerful, good walk mode, easy mode switch
Cons: Wimpy liner, inferior power strap, too stiff
Walk mode is easy to engage, made easier if you go for the Pro 130, 120, 110, or W100 thanks to a buckled power strap that makes loosening the power strap much faster and easier. It also allows you to cinch the power strap to the same level of compression that you normally expect from a metal buckle.
Two complaints with the Pro Light. First, the liner is thin. If you want a thermomoldable liner you would be better off with an Intuition liner which is thicker and constructed better. On the other hand, you may prefer the thinner liner since the boot is not excessively wide (98mm width) and also has a fairly high instep.
The main thing you will want to do with the Pro Light is upgrade the power strap to the buckled version available with the Pro 130. That version is superior in my opinion, not only for the buckled strap, but also for the alpine caliber liner.
More details at EarnYourTurns.com