My Zesto Leto just came back from Zesto and after having the ESP upgrade it's even better than when it was built . This pre is "next level" in my opinion , it sounds incredible.
Unlikely I will ever part with ....it's arguably the best component I've owned to date. When the time comes to get back I to vinyl I will be looking for a used Zesto phono pre. Stuff is good !!!!! Best customer service I have ever experienced too.