As Sherod says, you should hear it in your system and let your ears decide. We all have different systems, rooms, ears and preferences.
However, since you have actively requested opinions from those who have heard one, I'll provide mine. I auditioned a TP2.1 with full upgrades and balanced outputs (I don't recall the official nomenclature of the model). I listened with stock tubes and with Siemens and Mullard NOS tubes.
To me, it was very similar in sound to solid state, with a fairly flat image. It did have good tonal balance, and good extension. However, I much preferred a Lamm LL2 Deluxe. At the time, I was using it with Belles 150A Reference monoblocks running in balanced mode, and the speakers were Silverline Sonata III. Cabling was Purist Audio Venustas and Oyaide PA-02. Power cord was a Purist Audio Dominus Ferrox.
YMMV.