FIR Convolution Reverb

I tried it on my laptop (i7 11800H, RTX 3060 6GB GDDR6).
All my reverbs use only 1% to 3% of the cpu. GPUaudio Fir Convolver uses over 25%.

Very disappointing, no explanation or details on a possible setting that would allow to exploit the gpu and not the cpu.

Furthermore, the choice of reverb parameters is limited to 10 IR types and a Mix button, it's mind-boggling.

Finally, on the site, all the comments are very complimentary but all in the conditional tense... as if nobody had used this plugin.