I'll let the professional haters say it better than I could:

“Overexposed is a hit-seeking missile that doesn’t just slaughter Maroon 5’s reputation for sincerity, it festoons its corpse with glitter, hairspray and Hello Kitty Stickers.” — The Washington Post

“Once a real live band whose humanity, however glossy it might have been, could be verified by its mostly organic sound, Maroon 5 now appears to have converted into a silicone simulacrum of its former self with “Overexposed,” a collection of faceless android pop guaranteed to sound exactly like all the songs sequenced around it on Top 40 radio.” — News OK