Review

Well I have had a pair for the long time. They served me really good. Then I have made a boo boo by being a bit to careless and fast removing one of them from the pin on the tube socket. Yeah there was a high voltage discharge that melted away the bent part that secures it to parts. Power supply was strong and therefore arc was very strong. Fuse blow but filter caps still provided enough rest energy to just vaporise those last 1.5 mm of bent steel.
Ordered the replacement in same color and one more pair. You get used to these so much that you just understand how much you get hooked up on them once you lose them.

Are they most accurate way to measure? Not really. They aren't meant to be either. Best possible solution? Most probably not. But they are great in what they are meant to do. They have good quality and they are proper isolated. Just use them for what they are meant for. Make sure they hang up good and do not make short circuits with them.
Good old school quality. Highly recommended.