Since Martin says he only uses Kontakt when Giga max out, I assume he's a PC user.
Strange, I don't have that much problem with Kontakt PC.
It is true that Giga has the best HD streaming ability so far (with that little latency), but it's really hard to run it along with Stylus, Atmosphere, Trilogy and other VSTis at the same time.
I'm converting my just-received VSL Solo Strings on the other PC. Using CDXtract 4.1, from Giga to Kontakt. Last week I converted the VSL Overdrive in the same way and found that everything worked fine except the layered instruments. The layers were simply mixed together.