Provari - very well made - pretty expensive. Doesn't have wattage - just vv. VAMO has both - lot's less money and works terrific (I have 2 and gave my third away). To me - it's a great device and they are well loved - but - you can have the same and more for less money. Maybe not as "pretty" but more functionality. My advice would be to get a VAMO - and, then a mech if you get into low resistance stuff.