I have a serious issue with buying sungalsses.
I have 4 pairs of each. well, actually, 6 pairs of costa & 4 MJ.
I have noticed frame quality slipping on the Costas. Also the Costa glass lenses seem to be a tad more fragile. It seems like a crap shoot when you send them in for fixing. sometimes you get charged for lenses, sometimes not. anything to fix on the frame is typically free.
The MJ have been very consistent, quality & service.
I can't really pick a favorite, each has its own place. The various lenses on the Costa are awesome for various conditions. I think that frame weight has a lot to do with which frame you have. I have another pair of MJs on order, so I really can't say I have a bias either way.
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