Impressive and very satisfying. Focused, detailed, present, luscious and rich. I bought two sets to replace the Psvane tubes that came stock with my Doge 10 MK3. They enhanced my music right out of the gate and bloomed into pure loveliness about 20 hours in, filling the room with sonic bliss via my Magnepan speakers. I had been leaning toward Golden Lions but am glad I found these. Linlai is an interesting company that has an intense interest in the history of tubes and they like to innovate. Reading about them intrigued me enough to take a chance. HiFi-Amplifiers delivered within 10 days to the US. The customer service was helpful and friendly, the price was a bargain. Recommended.