Yes i bought one, worked for about a week. Seemed to work great. Then the entire network completely stopped -- wired and wireless, had to reset, that was on a Friday night. Then 12 hrs later Saturday morning, wolk up was completely dead again. Returned to Amazon after that. Top was warm, bottom was quite hot. Suspect this router doesn't cool properly due to unique design. Went back to ASUS AC1900P, which is a boring choice, but least is a proven design.
I recently had a VERY similar Blue Cave experience to the person I quoted above.
After receiving my router, I upgraded firmware to the May 25 2018 one - the one with the myriad of security patches and MU-MIMO support, as posted on the Asus support website.
The router will appear to work fine for about 10 minutes ... then, pingtimes to all
internet sites will increase dramatically. For example, pinging my ISP's dns server will average 600ms, and go as high as 2000ms. Typically, it's a 9-12ms ping. Similar results are found when pinging 8.8.8.8, 1.1.1.1,
www.google.com, etc.
I can put my mediocre previous router back on (Archer C9) and internet ping times are all back to normal. Basically, I can get 9-12ms ping to
www.google.com for
15 minutes straight! Then, if I put the Blue Cave back on, it'll appear to ping fine for the first 7-8 minutes (probably because it's "cool" since it was turned off for a bit), then start to degrade. At 10 minutes uptime, average ping to internet sites is about 200-300ms. At 30 minutes uptime (right now) I'm getting 750ms average ping!!
What's strange is that while all this is going on, local LAN-side pingtimes are unaffected, and still 2-3ms for wireless to wireless (i.e. laptop to laptop).