Is this the right place to be recommending a rival product? I'll have a look. Thanks.
It's not a rival product.
LilyPond is only a program for engraving music.
LilyPad is an editor as a frontend that is very basic and which is provided for your convenience.
I think everybody working seriously with LilyPond will use a more dedicated editor as a front end.
Frescobaldi is one of them.
See http://www.lilypond.org/easier-editing.html