I have seen various threads on a US site that shows some love for it over there:

https://www.airgunnation.com/threads/hw70.1299868/

It got me a little interested, but can't justify the cost of one for casual plinking. Picked up a Snowpeak SP500 last week that is the same principle and is nice to shoot after sorting out the heavy trigger, but it will not be the quality of the HW70...