I've been wearing these for a few months now and they work fairly well.  I have a large face, so finding sunglasses that fit can be a challenge.  These work admirably, although they are not without their nits.

Before opening the package, I was expecting a somewhat heavier, more 'pro' feel from these glasses.  These are very lightweight.  More lightweight than some $10 sunglasses I've bought in the past, so I have some misgivings about how long they'll last.  I wear decent quality reading glasses and can expect a pair of those to last 3-6 months if I coddle them.  These VonZippers have the same feel.  Of course, the fact they they're going on almost six months is a good sign.  Still, I'm not sure that these will last for years like my pair of original 1980s Wayfarers did before I dropped them off of a mountain cliff.

[On the topic of Wayfarers:  Unfortunately, the newest generations of Rayban's Wayfarers have become just another Euro-conglomerate product line and leave a LOT to be desired - cheesy plastic instead of acetate and polycarb instead of glass.  All while dumbing-down the original design (the current generation of wearers doesn't know what original Wayfarers looked like, they just might have heard the name somewhere...).  Plus, it looks like they've really engineered in the planned obsolescence.  All while jacking prices way up.

Way to trample on an American original AND cost-cut at your customers' expense Luxottica...I mean, RayBland.

RIP, original Wayfarers...we hardly knew ye...]

Anyway, for the VonZippers, time will tell.  And I'll update this review as things progress.  For now, conditionally recommended.