To let you evaluate the Hybrid Pianos on your own sampler (which IS actually the only way to really get to know a new sample lib) we created playable demo instrument files for GigaStudio3 and Kontakt2. They are both limited to the middle 2 full octaves plus all C's. They offer the 20 velocity layers and the full 24 bits wavefiles that are exactly the same as in the full versions.
You can find the demo instruments, details about the features of the demos, the product manuals, the IR and GPulse content notes and all the download links here: HYBRID PLAYABLE DEMO FILES
The Playable Kontakt demo file is a fully functionial K2 multi which includes a fully operational HolyGrail Add-On demo version besides 5 special scripts. The Kontakt Demo Instrument is using Hybrid Piano Nr. 2. The Giga demo is similar but uses Hybrid Nr.1 instead.
Both files are approx. 400 MB archives and expand to almost 1 GB of data.