The Union Chapel Organ is a beautifully sampled instrument. If you play the organ and know how to register it, then you'll have no problem using the UCO. However, if you're a newbie to the organ and don't want to learn organ registration, you might prefer Spitfire's Symphonic Organ, which offers curated registrations made by professional organists. However, anyone willing to learn about even the basics of organ registration can achieve wonderful results with the UCO. It sounds best (most realistic) when you use multiple mic positions to emulate the numerous reflections the instrument elicits in a real acoustical space. I only wish Spitfire had sampled all 37 stops of the actual Union Chapel Organ. The stops they did sample are beautiful, but light on reed-work. I wish they had sampled a bit more of the organ's reed-work. The Great has one trumpet and one clarion, which appear among Spitfire's sampled stops. However, in addition the actual organ contains a Corno di Bassetto (8') in its Choir, as well as trumpets (8') and clarions (4') in both its Choir and Swell. Without these, it's difficult to use the Swell to achieve a reedy timbre, although having the Mixture stop helps somewhat in this regard. The advantage to having these in the Swell is to have samples that can crescendo and decrescendo naturally. Nonetheless, Spitfire Audio has produced one of my favorite sample libraries in the Union Chapel Organ, one that I've already used in four projects, and one that just shines straight out of the box. Highly recommended!
