Starts off better than it finishes, but 'Snowball Express' is still a fairly fun watch.
Dean Jones (Johnny) is once again the best actor on display, though Harry Morgan (Jesse) runs him relatively close. Keenan Wynn is alright as Ridgeway, though I'm not a huge fan of Wynn's - which isn't good given he basically plays the same type of character over and over.
The premise and how it progresses is fine - could've been greater, could've been worse. It's not as funny as I would've predicted/how the film thinks it is, but there are one or two decent gags worthy of a chuckle.
Nothing spectacular, probably worth a view to see if you like it though.