Got one for my WC. Not a fan of them. Hard to keep clean and you can't have flyscreens.
We have heaps of lourves in our current house & they're all crimsafe screened so they can be screened. I find the lourves themselves are easy to clean, I actually clean them more often than my double hungs cause I can do both sides from inside the house, having said that though the cavity that is in between the lourve & the crimsafe does get HEAPS of spiders/bugs ect & at the bottom of the casing it is awkward to clean. This may be alleviated if you had removable flyscreens as opposed to a fixed screen option.
For an aesthetic purpose I love them, particularly if you're saying your theme is beachy & you can't go past them for air flow IMO.
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