It might not sound exactly like the vintage LA-2A, but I'm not concerned with that. If a box makes the signal just passed through it without compression sound better, than it is worth having. And KT-2A does this in a very nice way. It softens the signal, smears it a bit in a pleasing way, smooths out the highs and opens the low mids. The compression is quite transparent, but of course very slow. Everything sounds smooth and creamy through it. I also use hardware 1176LN and a custom made Vari-mu compressor, but this one imparts the greatest amount of smoothness to the sound (1176 obviously doesn't).
The build quality is nothing I can complain about. Very good.
Well done Klark Teknik!