Are there any good reviews of their monitors?
I don't think there that many, I only remember seeing one on Linus Tech Tips before the original 4k glossy was launched where the monitor was good but the firmware was still very "pre production".
I think their monitors are good, not amazing but they're mostly using good LG Nano IPS panels, not much can go wrong there, and they also added some cool features like integer scaling on the monitor, the problem is you're tossing an expensive coin at a company known to not keep their promises and known to provide a terrible customer service to the point of it being fraud.
Here's one, TL
W it's good but it's expensive and shipped so late it's not competitive with what was able to come to market before it.
This supposed 32'' 4k OLED will be more of the same, there's no known panel being made with those specs, they're promising to ship something and accepting pre-orders from it and it's pretty certain others monitors will come to market sooner than them, just like what happened with the 4k spectrum or the new 1440p OLED's.
Put the pre order price in an index fund and whenever this actually is available you'll be ready to pay full price