So good, it's invisible.
Clearly concerned that the performance of the Luba will fall short given many other reviews, however, there's no machine to find out. Ordered for 'delivery' in 2-3 days, yet no sign, no date set, no nothing, 14 days later. Money gets taken immediately. These guys are using orders for cashflow to produce. They have almost zero agents in UK, which I did know, but if this is how they operate, I have little hope go getting a good experience. I'd avoid if I were you.