We have several Zojirushi products (rice cookers, vacuum pots, thermos etc) already, and added the Stainless Steel Mug 20oz to the collection as the old 16oz thermos was slightly damaged after a significant drop recently.
We have been using the 20oz thermos daily from the day it arrived and continue to be impressed.
Pros: Boiled water remains scolding hot after 6 hours, very warm after 12 hours. Cold water remains icy cold much longer than hot water. Quick lock/unlock/open. Large spout for faster-flow pouring. Lid components are easily detachable allowing simple cleaning. Compact and light enough to carry around.
Con: Don't pour too quickly as water will spurt through the smaller opening above the spout (vent allows smoother flow).
In our experience, there's no noticeable difference between products produced in Thailand/Japan, but the price is significantly different.
Overall great product with a very minor inconvenience.