I also have the Icon TIMAX2 mesh jacket. I suppose it does fit a little smaller, but I since I don't use the liner, it fits perfectly.
I like it. It keeps me from roasting on those hot summer days. If I had to complain, it would be that the padding on the front of the jacket on the chest is a little thick for a very specific way that I use the jacket. What I mean by that is I have a remote control door opener in each of the pockets (both left and right side front pockets). One door opener opens my garage door at home, and the other opens a gated garage at my workplace (don't ask how I got the codes 'cus I'm not tellin'
) Anyway, when I want to activate the remote control I just press the button through my jacket. The thick padding in the front of the jacket makes it a little more difficult to find the button.
Overall, I'd recommend it.