I liked the 1st, loathed the 2nd, tolerated the 3rd, and didn't find the 4th horrible.

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SPOILERS

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Good: Mark Walhberg, Stanley Tucci, humour (elevator guy made me LOL), Kelsey Grammer plays a pretty good bad guy, of course the action sequences, Lockdown.

Bad: Dinobots underused, Transformer designs more of a confusing eyesore, rehashed plot, indestructible humans (you thought Indy in the fridge was far out?), hyper editing, pace all over the place, way too many locale changes, too long (my ass was more numb than my brain), pandering that made my eyes roll, Bud Light and Victoria's Secret, unnecessary Galvatron.

My brain said no but my eyes said yes.

Forgot to mention the worse: extreme sexualization of a 17 year old high sxhooler and the implication, actually they literally give the okay (via Romeo & Juliet statute) for an adult to have the sexual relations with a minor.