My Stjarna sounds great, especially with the newer "X" versions of Audio Technica cartridges (currently using a VM740xML). I had an Ortofon Concorde Music Bronze on the SL-1300G and it was very very good, but the 740xML is smoother and quieter. When I had the Bronze on the table I had to set the gain to 40db (the Concorde has 6mV output) when set at 47db it picked up every little pop/scratch on older records. With the 740xML with a much lower output (3.2mV) I set the gain on the Stjarna to 47db and the cartridge is sweet and silent.
The Concorde also liked the stock Russian made 6N1P tubes, while the 740xML likes the JJ E88CC/6922 better. I have the Concorde on my SL-1200GR2 in the office system with a Pro-Ject Tube Box DS2 and a pair of Psvane Horizon 12AX7 tubes and it is perfect with the gain set at 40 db If I bump it up to 45db the noise comes back.
Anyway, the Stjarna is magic once you figure out which cartridge/tube combo to use.