Is a 1943 film about soldiers going off to war chock full of propaganda? Yes, yes it is. Is it fun? Also yes.
The plot that they use is a bit weak at points, but has it's moments as it follows a group of soldiers with leave in New York before heading for Europe. However the Stage Door Canteen it focuses on, using a mix of shows and other cameos, does a great job of being a cavalcade of stars (and forgotten stars).
With all that, there's some good songs and a lot of fun comedy, particularly from Ed Wynn and George Jessel. There's also an Edgar Bergen and Charlie McCarthy bit and I was surprised to learn that Bergen can do ventriloquism, as he doesn't normally. So good for him.
It's fun for what it is, and that's some WWII propaganda that still was trying to paint the Russians and Chinese as our important new allies.