Yes, I noticed that on your web page, though I can't seem to find it now, so thank you for providing it.
I notice that some of the things you've put there are extremely subjective and are definitely what I'd call marketing speak .
Alright, I keep to upload more images and videos for
demo and
prototype.
And I would like to show you 2019 version video.
please check it, and you may find more reasons why I did it.
'Beautiful Form Design' - I find particularly weird, I'd say that the the Keyboardio has a particularly beautiful wooden form and the Ergogox Ez is pretty nice on the eyes. Why the X for them?
Thin Edge Slim - Compared to what? The Keymouse has almost no edge and the Ergogox's wrist wrest is the same rough shape as yours. Why the X for them?
Pro Stand For Other Devices - Sure, but this is a unique feature, so it's not really a fair thing to put on a comparison. Also, according to your website, those are 'optional' so I assume they cost extra and therefore shouldn't be included as part of a price comparison.
Two-Handed Work Style - This seems pretty unspecific. I'm using a two handed work style typing on a 60% board right now, in fact I almost always use two hands. Are the Ergodox or Keyboardio Model 01 not two handed? Maybe you mean that you don't ever have to take your hands off? Well then the Keymouse is definitely two-handed in that case. Also, since you have to buy your pro stand AND provide your own mouse or trackpad, you can't really offer that as a selling point in a price/feature comparison.
Switching To Connected Devices - You don't really expand on this, so I assume you mean that the BT chip can store five different device profiles? Fair enough, that's a good feature. There's not really any reason the Keymouse can't be connected to from any device though.

1. If compare with other concave keyboards, people only said Designer Keyboard is beautiful.
2. Most edge of concave keyboards is more than 10mm, the edge of Designer Keyboard is 4-5mm.
3. Some users need left only, right, both or none. We offer 6 options for Pro Stand.
4. Two-Handed Work Style is the core of Designer Keyboard which is inspired by
3D mouse. For example, one hand for zoom and pan, other hand for select and command for do faster. From their study, It can save 5% time, and save 80 hours per year.
5. Yes, the chip can store five different device profiles, and one key to switch to different devices.
I'd argue that you also highlight unique features about your board, while not indicating anything that those boards have that yours doesn't. Things like LEDs might not be important to you, but the Model 01 and the Ergodox Ez both feature those and that is arguably a part of their value. In fact, if you're not putting that on the chart, the Ergodox Ez should be $325, not $354. For that price, the Ergodox also has adjustable tenting, rather than a fixed angle, so that's worth mentioning, I feel.
I'm not in any way criticising the design of you board, I think you've done great work designing it, have come up with a great website, and are clearly good at marketing it. I just feel that it's important to be transparent about things and not go too heavy on those kinds of comparisons that aren't entirely fair or honest, in my opinion. Tables like that, skewed in a positive fashion towards your product without highlighting any positives of any of the others may be good marketing, but it doesn't seem very classy.
Edit: Also, just because I'm still curious, you didn't answer how the two halves communicate with each other, can you explain?
So simple, when you turn on it, 2 keyboards will auto connect like that: mac - master keyboard - slave keyboard
Thanks, some price was outdated, will update.
So maybe I ask you some questions.
Why did people buy Designer Keyboard?
And what you think about Two-handed work style after you check the
link?
How to draw faster 5-10% from keyboard and mouse?
You didn't see most pros of the keyboard, maybe I am not explain very clearly from the web.
I will keep to update it.
And maybe one day you come to London, I am happy to show you the propotype.