I have a Transcendent.
It is good for small signal tubes, just OK (at best) for power triodes, and not too good for power pentodes as it has significant limitations at testing under "real world" conditions of plate and screen voltages.
If you can afford an Amplitrex get one as there is nothing else comparable that is generally commercially available. If you don't, then you will spend a lot of money to ultimately figure out that you should have.