Let me preface my review by saying that I'm a huge Marvel fan--I own every Marvel movie every made. However, I wouldn't watch War Zone again if you paid me. It's puerile in the extreme and actually quite grinding. The characters are annoying--especially Jigsaw & his brother. I took my partner to see the movie in the cinema, and I apologized after we left, as no-one should have to endure this torturous movie. Unless you're 10 years old, avoid this movie at all costs.
The 1st Punisher is far better. Rebecca Romijn-Stamos is a wonderfully poignant character, and Thomas Jane is really good, although I do think Ray Stevenson looks more like the comic version of the character. The only far-fetched element of the movie is all the shots Thomas Jane takes, only to survive. However, overall, the movie works really well, so it'll give you a couple of hours of entertainment.
I'd give the 1st Punisher 7/10. War Zone: 1/10.