Hi! If you’re considering buying any of the Keylabs, just wanted to post this to inform you of my experience. They don’t have reviews on the site, and have basically stopped responding to any of my emails/messages so if they’re reading this forum hopefully they will reach out to help resolve some of these too.
UPDATE: They have responded, but in all honesty, these criticisms I have of their system/build quality still stand and I believe are still valid considerations when making a purchase. Had I known these when I was first starting out to buy Arturia, I would’ve probably reconsidered.
1.) BUILD QUALITY: I owned the Arturia Keylab 88 (Mark 1), from 2019 -2023. There were countless frustrating issues with the velocity, sustain pedal and the pitch bend less than a year in. I stuck it out but eventually it got to be too much so I sold it and bought an Arturia Keylab 49 (Mark 2). I was thinking that maybe they learned and would have minimal issues on that keyboard.
Just recently, about a year after purchase, the pitch bend started malfunctioning. When I bend up, the value goes to 0 first before it starts going up to 127.
Take note that the first Keylab I had never left the house, and the second was used on just TWO gigs recently. I use it everyday but it stays at home, with a dust cover.
I have owned a Yamaha PSR that cost half as much as this, and 12 years after purchase, the pitch bend on that was still working. And it played on well over 30-40 gigs and was even rained on once! Crazy!
I cannot speak to their higher-end equipment. I don’t have the money to shell out for those and frankly I don’t think I ever will, considering the reputation that their gear has in my book. That said, would you really want to still buy the MK3? 
Plus no Poly Aftertouch. NI has it 
2.) CUSTOMER SUPPORT: I asked them to change the email they were sending their support to because that old one was a .edu email. Ok that’s my fault for doing that. In 2022 and then 2023, I sent multiple support questions from the Arturia website. At one point, I asked them to change the email they sent support emails to my personal, and was told they would do so.
When I asked another support question later (I had to do lots of these due to the Keylab 88 MK I being such a fickle beast), I was surprised that I didn’t receive a response promptly as they usually did.
So I went over to my .edu email and LO AND BEHOLD, their response was in the inbox. I asked them AGAIN to send the responses to my personal, and this happened twice. Both times they said that they would do this (this was first Gaby from Tech Support, then Diego from Registration Support when I was about to sell the keyboard).
So when I sent them a recent support email asking about my recent pitch bend issue, I made sure to let them know PLEASE SEND IT TO MY PERSONAL EMAIL because I already know they keep messing that up. A week later, no response. I sent a follow up. No response. I came to the conclusion that they once again forgot or intentionally did not update my email address for support emails. Which is strange because their promotion emails and ads come thru just fine since my email is updated on the site. 
At any rate, since I no longer have access to that email that leaves my support null and void since they don’t have a ticket on the site either to check support status. I DM’d them to ask about this. No response.
All avenues exhausted, I believe that the only thing left for me is to sell this unit (repair cost is prohibitively high in my country, and it’s already out of warranty) and replace it with a more reliable unit, possibly Korg, Roland or Yamaha.
This is such a bummer to me, since I believed so much in their company. I’ve purchased so much of their stuff (FX Collection, V Collection, some of the Augmented series, aforementioned controllers) but apparently that’s not enough for them to consider me a worthy enough customer to right these issues.
Honestly if it was just 1) that was the issue I would be much less upset. However with how they’ve acted, it makes me want to re-sell V Collection and just buy Omnisphere with the return 
Too late for that now anyway.
At any rate, just wanted to post this to let prospective buyers know about my experience. I’m a very non-confrontational person who hates the thought of conflict, but this has honestly cost me a lot of money and time, and I think others deserve to know too.