I've owned the Dwarf for over a year now and while it's a nice concept, the execution is extremely poor.
It has constant noise problems (that honestly make it unusable in a professional context) and has constant bugs / crashes that make it unusable in a live situation.
If you look online or contact their support there are a number of 'fixes' (e.g. buy a new power supply because the one it ships with is 'noisy'), but they don't work 100% and every new software update breaks something new.
Add to that, most of the standard plugins (e.g. amp FX modelling) are open source and not fantastic quality - if you want a quality multi-FX guitar unit, go with a tried and tested brand like Line6 or Headrush, and if you like the modular concept try an Empress Zoia, but stick away from this.