David M.wrote a review of Giro Aether MIPS Helmet on May 24, 2019
I just recently decided to update to Mips technology after happily using the Giro Synthe for the last few years. The cost of the Aether was a bit of a deterrent so I first tried the Bell Z20 Mips in Ghost (reflective silver). I found/confirmed that Bell is more suitable for round heads...where Giro favors my large, oblong head. I ponied up and exchanged for the Aether in matte black/ flash (reflective). I should say that the Bell was impressive, and comfortable... particularly the padding design. Also kudos for including a second set of pads with Z20 (take note Giro!). The reflective qualities of the "Ghost Z20" were far inferior to the "Flash" of the Giro.
So the fit and finish of the Aether impresses, as do the reflective qualities of the Flash. It is a bit less bulky then the Z20. The fit and comfort (to my primarily bald head) is similar to the Synthe. I took a good deal of time getting the straps set up just right for me. Ventilation is comparable or a bit better then the Synthe. Due to the slightly increased depth of the vents (due to Mips design), crosswinds don't seem penetrate into the helmet as well.
Unique to this review, I fortunately/unfortunately can attest to the safety of the helmet (what we spend the money for, but hope not to use). On my fourth ride in the helmet, at the back of a 3 man pace line, I caught a bad rut/potlhole on a cruddy stretch of pavement that dropped me onto my bars. I almost recovered but went into rider #2's back tire, and I went down very hard at 20+mph. In my particular circumstance the Mips did an amazing job of buffering a violent impact. I never lost consciousness or was concussed (did sustain road rash, torn Assos bibs, and 3 breaks in my clavicle requiring surgical repair). The attached photo shows the result.
So the Aether is obviously spendy. Is it worth it? In my case...Absolutely (although I wish I had been left to wonder).