I was given a money back offer on my D-225. There was no need to take them up on it.
It is a great amp that can handle difficult speaker loads. The transparency is amazing. I think the leap of faith for me was more about the TRL house sound. Having had a TRL digital mod done to my DAC I got a taste of their house sound before I bought the amp. The question for me was how much more I could handle. It's a quite addictive sound, especially when you add more TRL components and cabling to the mix.
You don't see these amps come up used for a reason. I sold mine by word of mouth. Saving up for my next TRL project. Battery powered monoblocks.