Why the hate part? I've had one of these on my wishlist for a long time (for my fixed) but have never got round to actually buying one. Would be interested to know more detail about the pros and cons.
About 3,000 miles on my Rohloff/Chainglider Riese and Muller ebike.
No problems so far.
Last time I removed the rear wheel I'm fairly sure there was a bit more slack in the chain, so there has been some wear.
I've lubed the chain once, but it didn't really need it as it was already covered in wet black gunk.
Were the chain open, I would give it a wipe, but I'm inclined to leave it.
Removing the wheel involves partial dismantling of the Chainglider, and it was a bit of a fiddle to put back together again last time.
I can't decide if it's a high quality lightweight component, or a few bits of cheap and cheerful plastic clipped together.
It has always looked to be on the verge of falling apart, but hasn't done so yet.
No drag or binding, so I reckon the benefits of clean running outweigh the minor negative of extra faff.