i have 1 also. i have 2 stainless 6's before getting the 7 and at first i wasnt sure about it. its a lil louder than the 6. but when i run mine atleast i have to lower the volts about 1 to 1 1/2 numbers. i like it a lil better for lining with a bigger needle group (and shading for that matter) but i think my 6 is jus a hair smoother running. on that note i wouldnt hesitate to purchase another one.as a matter o fact i think i will soon.