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Opamp Labs transformers opinions?

Hi all,

Not much of a contributor/visitor to this site until recently but glad to see the community here.

Have a question on a potential transformer vendor for some of my builds.

Right now I am working on a "vari-mu" compressor project and a mic preamp project.

Have been trying to source good quality transformers without spending tons of $.

Ran across Opamp Labs transformers (yes, they require octal sockets which I have a bunch of) for a very good price and wondered what y'all thought?

Was thinking of using this for the input to my vari-mu project...

this (reversed) for the interstage for the vari-mu and for the output for the mic pre, and

this for the output for the vari-mu.

Any reason why these would be less than ideal? Other opinions?

Cheers,
Chris