Has anyboyd used this amp, your thoughts on it

Cayin make good amps thanks I'll check out those line magnetics.

Beware of those cheap tube amps. They often have a large and impressive box made to look like transformers, but inside that painted wood or plastic box is a "tiny" transformer.  Many of those manufacturers even add weights inside so that the amp feels heavy and powerful. Many also use a tiny board for class D amplification and the tubes aren't even part of the audio circuit! There are videos on YouTube if you look.

Yeah they're a Gamble unless you can find a thread here a thread on hifi.org or somewhere where someone's bought one and there's a bunch of people following it in a thread that's probably the only way I would buy one and I actually have found one.

I did find a 709 B amplifier it's a headphone amp / preamp it had about a 40 page following number of years ago but it seems like a good amp and it's been updated I actually purchased it.

I appreciate everybody's input a lot of choices obviously I actually bought a it's a 708 B headphone/ preamp.  What I'm looking for is now some help with E88CC tubes anybody here have any experience with these tubes I'm looking for some good sounding models RCA Mullard anybody have any experience with these?