I think it will be more than enough for a boost. It's hard to measure in my tent because my tent is in an apartment and my birds live in there, but my CO2 is consistently reading at 1050 +-100 at soil, which I will take. It seems like the Exhale bag is contributing ~300 to that number based on my trials with and without, but because the intake has an inconsistent reading in the room (I have checked), it's either a completely shitty device or the CO2 fluctuates based on the presence of people, animals, etc.
By the eye test, my plants seem to like it. So whatever, it was not very expensive and I am not going to do a more expensive solution because it's a tent and I am pulling air out of it constantly, so I am not expecting much. I will evaluate again as I think about whether to buy another after this grow. It's definitely doing SOMETHING though: the organic matter is getting eaten away and it is all white on the top.