I got interested in Athlon Optics partly because they're located in the Kansas City, Ks. area, and mostly because of what I'd read about their rifle scope lineup. I bought into this interest by purchasing three Midas 4.5-27x50s in the MOA version, along with an Argos 1-4x20. These are all made in China; AFAIK, only the Cronus line is made in Japan. At any rate, after mounting one of the Midas scopes on a custom Howa 223 (trued action, Bartlein 1-7.2tw bbl), and zeroing it at 100yds, I moved on back to 600yds, and found this scope performs on par with a couple of Vortex Viper 6-24x50 PST scopes I've owned for a few years. My impression is that the optical quality of the Midas scope is at least as good as the Vortex PST, perhaps a tad better. The Midas tracked very accurately, so I've been satisfied with it. Only drawback to the Midas line in my opinion is that they don't make it in a ffp version, while their less expensive Talos & Argos lines are available in ffp. However, the guys at Athlon will be announcing an Aries line at SHOT, which will slot in between the Midas & Cronus lines, and will be made in ffp versions.
I also bought a couple of the Cronus 4.5-29x56 scopes in the mil/mil version when they got another shipment of them in several months ago. These are big 34mm tube scopes, with 10 mils/revolution, zero stop & a very usable mil reticle. I put one on a custom 223 AI, the other on a Stiller 2500XR/Krieger 22RF trainer. Putting a scope like this on a 22RF may seem like overkill, but this is a very accurate rifle, in a Manners T4A stock, and was built to be as close as possible to one of my CF PRS-style competition rifles, so having a scope similar to the Kahles K624i scopes on my comp rifles makes sense. The last time I shot the 223AI at 600, I had one of my Bighorn rifles in 6XC with Kahles scope along. There was a lot of mirage on this particular day, and I was pleasantly surprised to discover that the Cronus handled it about as well as the Kahles did. I've always been very impressed with the optical quality of my Kahles scopes (two each of Gen II & Gen III versions), and at least at this point in time, I'm thinking the Cronus glass quality is very close to - if not equal to - that of the $2990 Kahles scopes.
Because of my very positive experiences with the Cronus scopes, I'm very much looking forward to getting a look at the new Aries line when they become available.