Talk about timing! I just packed up my Roscoe LG-3005 fretless to get ready to head out for service and thought I'd check LGM.
I've been playing this bass in services at two churches since about 2007 (I think that's when I got it).
I got it to get that string bass type of sound. It also sounds great when you palm mute, especially on reggae type songs. This morning we're gonna do Donnie McClurkin's "Caribbean Medley" which has a nice reggae bounce to it and a deep hollow bass tone. I love playing that song on my fretless.
I also like playing slow, expressive songs on it. Next week at my other church we'll be doing "Center Of My Joy" and "I Call You Faithful" I'll definitely use the fretless for the first one, maybe both. I like doing vibrato type stuff on the longer duration notes on "Center Of My Joy"

My fretless has an unlined ebony board. I specced it unlined just because I like the look of the un-interrupted ebony. I was scared to death that I wouldn't be able to play it in tune without the fretlines. but I had owned two other fretless basses over the years and I do still have markers on the side of the fingerboard that help me keep my place. Still gotta rely on the ears, though.
Peace,
James