As a fan of Transformers comics, I'd stuck out Mike Costa's run on the ongoing book through some highs and lows.
While I think his run started well, Costa seemed to lose his way early on. There was a sense that his story was building to something, but the agonisingly slow pace he told it at was a real trial to endure.
What's in this book is the conclusion of the Earth-based portion of the story... and it is SERIOUSLY poor.
Brendan Cahill does a fair job on the artwork - even if I don't think he draws the faces of the characters particularly well. His backdrops and human characters (who Costa DID insist on using more than Optimus and chums) are all decent and nicely detailed, though, and he knows how to set the scene capably.
But the problem lies in Costa's storytelling. This book demonstrates once and for all time that he DOES NOT get these characters at all. Look at Prowl - he changes into a Police car. Fine. Except Costa seems to equate this to the character acting and speaking like a cop - which doesn't necessarily follow. Nor does his turn of phrase, at times. He actually says 'a dog whizzed on me this afternoon' at one point. Seriously? Ugh. This has been the bane of the entire run: a writer and - unforgivably - an editor who do not understand the voices of these characters at all.
The whole story progresses at a pretty excitement-free pace, ends weakly and doesn't give us the kind of resolution a two-year story arc deserves. After the excellence of the material collected in the 'Chaos Theory' trade, this is an unbelievable step down in quality. Even the atrociously drawn and sometimes painfully written Heart Of Darkness was better than this.
Avoid this garbage!