I don’t buy that many modules (unless it’s MFB) but this one I made a exception. I needed a good way to combine my rack with my DAW and this module is in my opinion the best to do so. I bought it second hand and only scratched the surface so far but recording my rack has never been so easy. The quality of the recordings is just amazing. I planning on using it to make some recording for the website while doing reviews of modules. I cost me quite a few buck but worth every penny.
https://www.expert-sleepers.co.uk/es9.html
Difficulty to build: No DIY