I have one that I bought in late summer and it can be a little warm in the sun, even with the vents open. Although, it does look good! I carry my Frogg Toggs on board all the time so when it rains, I just put my jacket on.
I've worn it a couple of times this winter and I can tell you it's not designed for the very cold, even with the liner in and a few extra layers. But that's ok, three seasons works for me.
And just like Happyspyder said, the collar rubs a little when it's snapped.
I only have the jacket, not the pants.