Longhin tube tester

Hello, Has anyone used the high voltage Longhin tube tester? Plus's and minus's? Can it check for noisy input tubes? Quality of construction? Thanks, Dick
I have one...construction is great it is very versatile but....unless you speak & understand Italian it is frustrating to decipher the "unimpressive" "so called" owners manual!! I guess It should of at least came w/ the "Rosseta Stone"!!