It is not worth spending money on buying a new one, it is too overpriced. It is worth taking it from your hands if you want a makrushnik, but why it is not clear. On crop, it copes well with its duties, on FF - worse (scale 1: 2 affects).
Different pros:
Pleasant picture, sharp at short distances (up to 5m. ), Small XA, filters of the same diameter with 50/1.8 and 28/2.8
Has some cons:
Unsharp at long distances (> 5m. ); scale 1:2, not the promised 1:1; noisy motor, on MDF the “trunk” travels…