I tried a few of these popular new Oh Yeah! One protein bars. As a fan of the Quest bars they're kind of emulating, who also dabbled in the original Oh Yeah! bars, I feel qualified to give my opinion. Not that being qualified to give an opinion has ever stopped me from doing it before.
Generally all these bars are softer & less chewy than the Quest bars, and covered in a thin layer of chocolate or choco-style coating. If you're sensitive to the aftertaste in protein bars I don't think these will change your mind - however if you can handle Quest bars, these are no worse. Some flavors will mask it better than others, like the first two I review. From what I've read and my own rudimentary knowledge, these are nutritionally sound with 20g of protein and just 1g of sugar. They're not 'natural', but see my dearth of Japanese novelty candy reviews to see how little I care for nature, anyway. I'll break down the first three flavors I tried, and will be updating again once I've tried the remaining 8.
Lemon Cake - I'm kinda 'meh' on lemon flavored things, but this is so accurately sweet, 'wholesome' and lemony, I actually love it. There's something to be said about accuracy in flavor making up for whether or not that flavor is actually great or not. I mean, the texture of these bars lends itself so well to something dense but not chewy, like a lemon bar.
Would I ever choose a lemon cake over a spoonful of cookie dough or a birthday cake? No. Would I choose this bar over those flavors? Oh yes, because it tastes exactly like a lemon square. I'm putting out an APB on APB - accuracy in protein bars. This one is the main suspect.
Birthday Cake - This is the flavor everyone else seems to go nuts for, so my expectations were high. I wouldn't say I was let down, but I did think it was inferior to lemon cake. I think it comes down to a personal preference thing though, as I prefer more 'strong' flavors rather than subtle. This birthday cake is pleasantly sweet & has a good base of vanilla, but it just didn't knock my out.
To be fair, I just don't think anything birthday cake flavored really would at this point. I've had it a lot, it's been a trending flavor for a few years now... while it is pretty tasty, it is basically sweet vanilla and not exactly mind blowing. I can see why people love this one so much because it does hardly taste like a protein bar (that protein taste is very well masked here!) but as someone who doesn't mind that protein bar aftertaste, I'm looking for something a bit more...esoteric. The sprinkles were cool, though.
Chocolate Chip Cookie Dough - This one gets very few admirers, as Quest really cornered the cookie dough fan market. You can see my review on that ol' classic here. Right away you can see that the Oh Yeah bar is covered in chocolate, while the Quest bar is left unadorned. The base flavor is pretty similar, which is salty, sweet, and indeed a lot like cookie dough.
The main difference is that the Oh Yeah bar is covered in a thin layer of chocolate, but the Quest bar has large chunks of it throughout the bar. That emulates cookie dough far better than a thin coating. I think that the Oh Yeah bar has maybe one or two chips, but definitely no chunks at all. Then there's the issue of microwaving - the bar is coated in chocolate which would definitely melt, and make it too messy to experiment with in that way. The Quest bar, however, is elevated to perfection when microwaved - gooey & texturally accurate.
It's not a bad bar by any means, but I'd always choose Quest for this specific flavor. Over all though, Lemon Cake wins over all other protein bars I've had before!