This comic is like, one of the greatest things ever.
It's got a tight timeline, but because of that, the stories are told non-chronologically. In fact, the latest miniseries, the Deadly Art of Science, actually is set the earliest in Robo's career, as he's just starting to deal with the dangerous (and very fun) world he inhabits. And by the way, Robo as a kid - full of geeky enthusiasm and naivete? Is a very fun thing, because it is a contrast to Robo's demeanor in other series where he's more stoic and dry with his wit.
Clevenger and company really do deserve every bit of praise they get; this is a fun pulpy series that doesn't skimp out on humor, action, and even pathos (without ever descending into melodrama).
There's nothing else like it out there and it deserves your attention and money. And no, Hellboy is not like this - despite the comparisons, Hellboy is all about surviving horror. Atomic Robo is tongue-in-cheek - more Ghostbusters than say, The Prophecy.