I'm so impressed with this library. Every instrument (there are actually 11 rather than 10 as the marketing says) has something good in it. Nearly all have some beautiful -- occasionally quirky -- quality to them that inspires me to compose around each of them. Personally, I recommend this to anyone creating compositions ranging from cinematic to ambient.
Most of the instruments are plucky (harp, lyre, mandola, etc.) or bell/handpan (the "hopi" instruments). The user-friendliness of the interface means that you have the basic controls either under keyswitches or the modwheel. Everything else is a matter of the tastefully recorded samples.
I thought that I found a couple of bugs on my first day of playing these. Once I sent my report to Versilian, I quickly got a thorough and helpful answer back. In each case, I was simply misunderstanding where to find keyswitches I was looking for.