It's a keyboard
Realistically, it's not going to work better or worse than any-other keyboard..
For long term use, ACTUAL use, not just the 20 posts a day on facebook, Eventually Ergonomics will matter, because of wrist pain with regards to FLAT keyboards.
Even a split keyboard such as this is fundamentally not an improvement upon 1 piece flat keyboards, because the WRIST ANGLE is what makes ALL the difference..
Literally nothing else matters or makes any difference in practical usage.. WRIST angle that's it..
You can take 2x regular 1 piece 87 key, prop them up to the right angles, and they work just fine with the minor dual hand timing inconsistency.
That's what I did for a time, before the Ergodox was available.. I was personally able to modify my typing rhythm to bypass the timing inconsistency between using 2 separate 87key keyboards.
Now, I don't recommend anyone use 2x 87, because the technique required to do so is probably only convenient enough for 100+ wpm people who are already very familiar with controlling their typing rhythm. .