This jacket is amazing overall. I bought this jacket to use in Northern California all year round, from 40F to 75F weather. It is hot during the day, but cools down pretty quick at nighttime. I am 6'3, athletic build and I wear a size 50 in Dainese and Rev'It gear. The XL in the Taichi jacket fit spot on and very similar to the other brands.
This jacket has everything you would want in a motorcycle jacket. Armor in the shoulders, elbows, back and chest. Zippers for air in the front and a large back zipper vent as well. There's some foam padding in front of the shoulders that also help when carrying a heavy backpack. The removable liner/jacket is very well placed when buckled in, and doesn't feel like it wants to come out every time you take the jacket off. On the bike, the stretch panels let you move your arms freely into position and it never feels like the jacket wants to restrict your movement. Great jacket!