The Sphinx is a great 2 channel integrated amplifier at the price point, with the power for most systems and offered by a company that supports their products. It is a hybrid having tubes in the preamp stage, some want to avoid tubes. It has features than many would not need, phonostage and headphone amp, and two many would like, DAC and processor loop. Therefore making it somewhat more esoteric a product.
I own a version 3 and am not using the phonostage or headphone amp at the moment. I would use a processor loop if it had one.