It is one of the good moments on this album, though the downside is it is one these incomplete tracks - when regarded on its own, without Broadway Melody of 1974 - that The Lamb has a number of. You just started, it gets going really strong, and you're already in another song. In this case the transition works well but I still wished they would have gone for more complete songs.
I get that, but for me and I assume others it's not incomplete. It's exactly what it needs to be, nothing more. If they'd run it any longer it wouldn't make sense and would be overstretched. This being a long complex story album it's appropriate to have the structure it does.
One of the many things I love about this, my absolute favourite Genesis album by some distance, is the different approach it necessitated which led to them using strong fragments as whole songs where they'd normally have joined them into longer multi-sectioned songs. But I understand why that wouldn't sit well with some fans.