I only have the Primax and Samsung S4 & S7 setups, so can’t compare the CV1 or Vive.
Firstly, you need to get passed the advertising. This product is not being advertised correctly, it is somewhat misleading, and if you purchase expecting to get exactly that, you will be disappointed (this is already well documented in this forum etc. etc.…).
Primax are working hard to fix these issues we are told, but as yet have not published a road map for the product which provides any confidence as to when future updates will be released, what fixes will be included, or what development is planned in the future, or at least I haven’t seen it (which says to me they may have rushed a product to market to be first, and are now fire-fighting development), so you need to ask yourself, do I believe it will get fixed (personally I do, over what timescale, no idea).
I will say to the Primax – guys – if you are starting to roll out to local agents in countries like the UK and US, you need to fix this advertising, not sure how it works in Asia, but here in the UK if your product doesn’t deliver to the advertised spec your company is going to end up in trouble with certain regulatory bodies and you will have to fully refund people (something GearBest are struggling, as they expect returns to have a demonstrable fault).
The resolution of the display is very good, screen door is mostly gone, especially when you appreciate the input signal is 1080 and it’s being up scaled to 4k. Yes at times I’ve seen some blur and ghosting, but I personally think much of this is due to the upscaling, and when higher native resolutions and fps are available this should get better. As for the various resolution changing mods discussed, forcing 2k in extending mode works if you can get through the Chinese app, but this is only useful for extend mode apps not Primax or Direct (unless I missed something?). All the other resolution mods work, but appreciate they are just methods to render / upscale the image; they do not change the native input signal.
I have not had any issues with focus / IPD, but then that’s probably just luck given the automatic adjustment doesn’t work yet. FOV I would suggest is as advertised and on par with other devices, but 110 degrees is not enough to feel a decent level of immersion, it does feel like you’re looking through binoculars sometimes, but this is part of being on the bleeding edge of technology, if there was a 180 degree model out there you’d buy that, there isn’t.
The screen colours and brightness cannot be described as vivid, but they are acceptable to me, I would put them on-par with using a Samsung S4 (1080) in a cheap headset (Homido etc.). In ‘normal’ mode the screen is a little darker than I would prefer, and in ‘cool’ mode the brightness is good but the colours are a little washed out. In either mode once you’ve been using it for 10 minutes you kind of get used to it (well I do).
360 video using SteamVR and the Simple Player works very well when you enable all the super sampling etc. (see other forum posts). The sharpness and resolution far exceed my Samsung S7 setup, things that are close to the screen look very real, but the effect is dramatically decreased the further things are away, again probably due to current 1080 upscaling.
Elite dangerous, whilst playable in VR it’s not the best experience, that’s not all a Primax issue, it’s just the FOV to really appreciate this in VR needs to be much bigger, you tend to only look around because you feel ‘you should be’, not because something caught your periphery vision and you wanted to turn and look, as such, much of the game is played looking forward, hence you’re probably better playing on a 4k monitor IMO. Generally, the same problem as with the 360 video here, in that the inside of the spaceship is very good, you can read all the text looks very real, but things in the distance are blurry / fussy.
So, is it worth it, I’m not going to answer that for you, but would say if you only want it to run Video then you can’t go far wrong, asking price vs your need to watch videos et. But, if you want it for games I would wait for the next firmware release to see what happens, you really need the higher native resolution and frame rate to make games play well.
Which will bring us to the next problem… when/if we do get it running as it should, very few of us are going to have horse power to drive it at 4k60, and probably end up running it lower resolutions anyway, lol, but at least we would have got what we all paid for!