I haven't used the placards and stencils for the Corsair, but I have used the set for the Tamiya 1/32 P-51D. Really well done stuff - perfectly printed, easy to use, and the instructions are very clear with numerous photos to aid things along. It really adds a lot of life to the cockpit and radios.
If it helps, I've never purchased a bad bit of aftermarket from Barracuda. The decals are always well-done and the resin stuff is absolutely hassle-free to clean up and install. It's a quality outfit to do business with.