I doubt critics will be singing its praises, but I personally found it enjoyable. My first complaint was that it took a while to actually get any Transformers on-screen. There's also the runtime; make sure you drink your soda very slowly (or better yet, skip it), because this film is a whopping 2 hours and 45 minutes long. If you have any liquids before the second half, regardless of how well you handle fluids, your bladder will feel ready to explode long before the film ends.
Personally, the part I found the most amusing was when Rainbow Dash transformed into an assault rifle. Yes, you read that right. I don't know which to say: "Rainbow Dash is Best Gun" or "Rainbow Dash is now can
I look forward to more, as the ending made it quite clear that there is at least one more planned.
I wish the merchandise was better. With the current wave of toys, they've sacrificed the fun parts such as transformation and posability in favor of simplicity and action gimmicks.
Is Transformers: Age of Extinction worth watching? Don't ask me; I've enjoyed all the Transformers films so far, so my opinions on the franchise do not reflect the majority opinions.