Since James Cameron, the Terminator franchise has stomped into theaters a couple times but has not been able to replicate his grasp on telling a story about humanity.
This movie isn't the botched Terminator 3, and mercifully ignores it. It presents artifacts from T1, but not the desperate loneliness and to be clear: this movie wasn't trying to be T4. It was more like a war story.
Its strongest suits are competent actors, indulgent CG action sequences and a moderately quick pace. It doesn't adhere to themes or storyline as well as the Cameron versions, but it is a visual feast. You could do worse for a ticket this summer.