I feel I should say why it's awesome, and I had the same misgivings as you have really, having seen reviews. You set it to 40% or 50% or something and you go there pretty much visually rather than by having a step be +5% or something. It just feels better to me, I know where my headphones should be and I turn on the amp and set them to the desired volume much faster than than when I had a traditional amp (I owned the dx3+ and I very much disliked the clicking noise).

It's definitely something to research before buying, I wasn't sure I'd like it but I'm absolutely sold on it now.