I've seen this misunderstanding repeatedly in reviews. The fact that it says 'Sentry World 1 of 5' has repeatedly confused people between it being a mini. It's just the first arc is five parts. xD
The best part about the new series is that it really sits down with Bob and makes him the heart of the Sentry again, a way he hasn't been since the original mini. You feel for Bob. His anxiety, his frustration, his dangerous nostalgia, his recklessness and his regrets. It's all very emotionally loaded, the way any good Sentry story should be, but grounded in the mundane reality of workaday life that a character like him needs.