[User 309201]

Almost anything one can say about the Vero 4K+ needs to be prefaced with "as of right now", because the device is under ongoing active development, and will remain so for quite some time.

So, AS OF RIGHT NOW:

• Most blu ray menus don't work (specifically, the ones that use Java don't). If you're playing an ISO, or from a disc backed up in folder format, it will give you a list of the disc's playlist files, listed with index number and duration of the video, and it will auto-select the one that's likely to be the full movie; but finding a specific "extra" within an ISO image can be fiddly. And it also can't handle fancy interactive features like picture-in-picture commentaries, or information pop-ups. (Granted, you don't tend to find these on 3D discs).
  
  
• 3D image quality is not perfect on all titles. On some films (including, for example, Avatar and Gravity) you get occasional bursts of macro-blocking. This may take a while to fix as (we are told) the fault lies in microcode, meaning it will require contributions from Amlogic. [UPDATE: We are told that Amlogic has succeeded in reproducing the problem and intend to look at it at some point. We don't known when.]
  
  
• Image quality on interlaced material can be poor.
  
  
• Upscaling quality is poor (and unlike other issues it's unlikely this will change in the future as it's a hardware limitation). So long as you are willing to set up a Kodi whitelist, this is not usually a problem, as you can output most videos at native resolution and have the TV do the upscaling. But if the video dimensions/frame-rate don't match a standard HDMI mode (e.g. if it's 720p/23.98Hz, or 720x540/50Hz), or if you need to use Kodi to correct for TV overscan, it may be a problem.
  
  
• Access to internet streaming services is via Kodi add-ons rather than native apps. Amazon Prime Video is limited to 960x540 resolution. Netflix is, for practical purposes, limited to 1280x720. So is Disney+. For YouTube the initial setup process is extremely fiddly, but it works okay after that. It does a good job with standard 720p videos on BBC iPlayer, but sadly it can't play 4K/HLG material on iPlayer, except for one test looo. (It should be noted that this is a limitation of the Kodi iPlayer add-on, and not under OSMC's control).
  
  
• 4K 60fps material like Gemini Man and Billy Lynn's Long Half-Time Walk plays with significant frame-skipping, particularly if subtitles are turned on.
  
  
• No support for Dolby Vision in any form, and it's unlikely there ever will be.
  
  
• It can sometimes run a little hot, so it needs good ventilation.
  
  
• Only two USB ports, once of which is normally taken up by a remote-control RF dongle. They're also only USB 2.0, not 3.0, so if you attach a local drive, read/write speeds are limited to ~40MB/s. That's far more than you need for playing UHD video, but transfers to or from that drive across the LAN will be slow. It also doesn't produce enough current to supply a USB-powered hard drive, so if you want to use one you need to add a powered USB hub.
  
  
• On a few 3D titles, if you're watching them in ISO format, the first time you skip forwards or backwards results in a long pause - could be as long as a minute. It only affects some films - notably Avatar and Valerian and the City of a Thousand Planets, and it's easy enough to work around by ripping to MKV instead of ISO. But I mention it for completeness.
  
  
• Several people (including me) have reported that the standard remote gets through batteries at an alarming rate. Mine needs a new (lithium) battery about once every three weeks.
  

However, all of that aside, there is indeed a lot to like. Not that many players offer MVC/frame-packed 3D playback; some can't pass through DTS-HD or TrueHD+Atmos; plenty lack certain output resolutions (e.g. the 2017 Shield can't output 480p or 576p) or certain refresh rates; some don't pass through HDR10 metadata properly; a number don't support HDR10+ and/or HLG; and a number can't decode VP9 profile 2 in hardware. All good stuff.

One thing I really do have to take issue with, @hdmkv, is the suggestion that the Nvidia Shield TV should ever be recommended. To be fair, I haven't tried the 2019 model, but I have the 2017 version, and it's a complete and utter disaster which shouldn't be recommended for anything, under any circumstances - particularly not for watching Netflix!