Documentation and Communication are king level
For DIY Neuroscience Kit - Pro
The delivery to Europe was quite fast for what I expected, and the product is exactly what it promises without any surprises and it has plenty of material and patches to get things running.
However I could not get running the examples with the new Arduino IDE and after checking documention, videos and examples I could talk to Upside Down Labs and they directed me to a specific tutorial which made it easier to debug and pointed out that there was an issue with the newest Arduino IDE, but with the legacy one I could read the values.
I do recommend them mostly because of this human factor.