I have had one for about 5 weeks and I love it. It is US made, unlike the Jolida, so its value may not be quite as high. It replaced a really fine solid state unit, and as the saying goes I want to listen to all my records again. With the right record it offers a large and DEEP sound stage, beautiful instrumental textures and it is completely unfazed by the loudest and most complex musical material. The tubed power supply provides whatever is called for.
Just a few cautions.
The Foz is a tube unit with no solid state devices in the signal path. It uses 6 tubes (+ a rectifier) to give it 3 gain stages. No transistor, no SUT. The max gain is only 60 db. A s/n ratio is not published. Compare that to your Jolida. I use it with a Shelter that has .4mV output and that is about as low as I think one should go in cartridge output with the Foz. I hear tube rush close to the speakers, but nothing to annoy me at the listening distance.
So far I have not rolled tubes. Actually they give you an extra tube that will change the sound somewhat, but I have not used it yet. It is easy to tube roll the Foz as you don't need matched tubes; each tube handles both L and R signal; you need quiet, balanced tubes. But tube rolling can be expensive if you let yourself go.
There is an extensive discussion on Audiogon. Do a search. Also look at the discussion on audioaficianado.org.
