Anybody heard anything about this CRT tester - good or bad?

I have one. It's OK for testing, but....I feel like it is a little harsh on the rejuvenate function, but it has saved a few jugs for me. I suspect it may have toasted a couple tubes that might have done better with a newer machine. I made a couple adapters for it to test the newer inline tubes. It's been a year or two since I used it....not seeing many tubes anymore

I have 1 of these with a bunch of sockets but have never found a tube old enough to test it. I would never test the rejuv function on it because I have a cr-70 that I would feel much safer using. Should be great for testing older crt's though. Believe mine was made in the 70's. It didn't have a manual but ended up hunting down a pdf for 20 bucks. I think it's great it checks all the guns at the same time!