Is it any good?

I have the DS game, and it's not very good.

The PSP version is a LOT less buggy! And better graphically.
This was because the DS game wasn't all made by Team17, while the PSP was.

They both have the same weapons though.

Is it any good?

I have the DS game, and it's not very good.

Compared to the DS version, the PSP version is godlike. I recommend getting it, especially if you have friends that like Worms.