I got access the other day and the tool is close to unusable from Australia (and likely many other non-EU locations) because of the latency and low intercontinental bandwidth. The only way to get it to work (ish) from here is to set up a high speed VPN connection to the Netherlands, where the application is physically located.
With decades of online service engineering experience, I can tell that they haven't done what is required to make a service like this snappy, which is "caching" the data to increase performance for users and reduce load on the application (explainer here
https://aws.amazon.com/caching/?tag=globalgrena0b-20 )
It is clear that there is no client (browser) caching implemented, i.e. everything is downloaded again every time we return to a page, and there is no web caching either, i.e. everything is loaded all they way from Netherlands on every page load, instead of being saved locally for much faster download speeds. Without my own "direct line" VPN connection I struggle to get 1Mbps, whereas with VPN I get closer to 10Mbps and none of the pages time out. Just imagine what it would be like with my 100Mbps+ internet connection if the content was cached locally in AUS.
I have submitted feedback, a support ticket, and emailed IA Australia to offer advice and specific pointers for how to make this tool much faster for everyone. It's a small change to the application and a modest cloud infrastructure cost with a niche application like this (literally a few hundred bucks a month) so I am optimistic that we will be able to see a drastic improvement in performance once done.
Sure, it doesn't change the fact that it's an online application, but at least it will be usable.