I love the Cleanness! highly underrated pedal IMO. I won mine through the t-shirt contest and it's been a great asset to my board. I definitely do the mild clean boost thing like you suggested, but it's also a really nice very low gain drive on the right settings...sort of covers the super transparent low gain my OCD can't quite get. Don't get me wrong, the OCD is mighty transparent, but the Cleanness really just sounds like a louder maybe slightly more driven tone from my clean...zero coloring on the right setting.
That's only half the fun though, I like to mess around with the different bandwidths and maybe give my sound a really lofi AM radio type thing with the bass dialed all the way back and the mids and treble boosted. I could of course EQ my amp that way, but this way I can switch it off! It also can do fun things with my dirt pedals since I have the Cleanness running after all my dirt. With my fuzzes I can dial in settings on the Cleanness to completely change the character of the fuzzes' tones, almost like giving me 2 pedals in one!
all in all, a great pedal. it's a subtle effect, but very useful.
this is the finish on mine:

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